Search a number
-
+
28794942 = 23211236323
BaseRepresentation
bin110110111011…
…0000000111110
32000011221020100
41231312000332
524332414232
62505101530
7466516161
oct155660076
960157210
1028794942
1115288080
1297878a6
135c72637
143b77ad8
1527dbc7c
hex1b7603e

28794942 has 48 divisors (see below), whose sum is σ = 71031168. Its totient is φ = 8345040.

The previous prime is 28794929. The next prime is 28794949. The reversal of 28794942 is 24949782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28794949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1393 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (1479816).

Almost surely, 228794942 is an apocalyptic number.

28794942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28794942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35515584).

28794942 is an abundant number, since it is smaller than the sum of its proper divisors (42236226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28794942 is a wasteful number, since it uses less digits than its factorization.

28794942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365 (or 6362 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28794942 is about 5366.0918739805. The cubic root of 28794942 is about 306.5058274943.

The spelling of 28794942 in words is "twenty-eight million, seven hundred ninety-four thousand, nine hundred forty-two".

Divisors: 1 2 3 6 9 11 18 22 23 33 46 66 69 99 138 198 207 253 414 506 759 1518 2277 4554 6323 12646 18969 37938 56907 69553 113814 139106 145429 208659 290858 417318 436287 625977 872574 1251954 1308861 1599719 2617722 3199438 4799157 9598314 14397471 28794942