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145779880 = 2353644497
BaseRepresentation
bin10001011000001…
…10110010101000
3101011022101101211
420230012302220
5244304424010
622244322504
73420052141
oct1054066250
9334271354
10145779880
117531a644
12409a3434
13242820ac
141550aac8
15cbe908a
hex8b06ca8

145779880 has 16 divisors (see below), whose sum is σ = 328004820. Its totient is φ = 58311936.

The previous prime is 145779877. The next prime is 145779899. The reversal of 145779880 is 88977541.

It can be written as a sum of positive squares in 2 ways, for example, as 141276996 + 4502884 = 11886^2 + 2122^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822209 + ... + 1822288.

Almost surely, 2145779880 is an apocalyptic number.

145779880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145779880 is an abundant number, since it is smaller than the sum of its proper divisors (182224940).

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

145779880 is a wasteful number, since it uses less digits than its factorization.

145779880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644508 (or 3644504 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 145779880 is about 12073.9339073891. The cubic root of 145779880 is about 526.2989813790.

The spelling of 145779880 in words is "one hundred forty-five million, seven hundred seventy-nine thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 3644497 7288994 14577988 18222485 29155976 36444970 72889940 145779880