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990724 = 22741863
BaseRepresentation
bin11110001111000000100
31212100000111
43301320010
5223200344
633122404
711264260
oct3617004
91770014
10990724
11617389
123b9404
13288c37
141bb0a0
15148834
hexf1e04

990724 has 24 divisors (see below), whose sum is σ = 2032128. Its totient is φ = 413760.

The previous prime is 990719. The next prime is 990733. The reversal of 990724 is 427099.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (84672).

2990724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016064).

990724 is an abundant number, since it is smaller than the sum of its proper divisors (1041404).

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

990724 is a wasteful number, since it uses less digits than its factorization.

990724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 990724 is about 995.3511943028. The cubic root of 990724 is about 99.6898389961.

The spelling of 990724 in words is "nine hundred ninety thousand, seven hundred twenty-four".

Divisors: 1 2 4 7 14 28 41 82 164 287 574 863 1148 1726 3452 6041 12082 24164 35383 70766 141532 247681 495362 990724