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68798980 = 22523149563
BaseRepresentation
bin1000001100111…
…00101000000100
311210110100110101
410012130220010
5120103031410
610454333444
71463532055
oct406345004
9153410411
1068798980
1135920768
121b05a284
131133ac73
1491cc72c
15608ed3a
hex419ca04

68798980 has 24 divisors (see below), whose sum is σ = 150760512. Its totient is φ = 26322912.

The previous prime is 68798971. The next prime is 68798999. The reversal of 68798980 is 8989786.

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, 74322 + ... + 75241.

It is an arithmetic number, because the mean of its divisors is an integer number (6281688).

Almost surely, 268798980 is an apocalyptic number.

It is an amenable number.

68798980 is an abundant number, since it is smaller than the sum of its proper divisors (81961532).

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

68798980 is a wasteful number, since it uses less digits than its factorization.

68798980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149595 (or 149593 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 68798980 is about 8294.5150551434. The cubic root of 68798980 is about 409.7578979173.

The spelling of 68798980 in words is "sixty-eight million, seven hundred ninety-eight thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 23 46 92 115 230 460 149563 299126 598252 747815 1495630 2991260 3439949 6879898 13759796 17199745 34399490 68798980