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9979986 = 231797843
BaseRepresentation
bin100110000100…
…100001010010
3200210000222010
4212010201102
510023324421
6553523350
7150554112
oct46044122
920700863
109979986
1156a7125
123413556
1320b5723
14147b042
15d22076
hex984852

9979986 has 16 divisors (see below), whose sum is σ = 21134304. Its totient is φ = 3130944.

The previous prime is 9979967. The next prime is 9979993. The reversal of 9979986 is 6899799.

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, 48820 + ... + 49023.

It is an arithmetic number, because the mean of its divisors is an integer number (1320894).

Almost surely, 29979986 is an apocalyptic number.

9979986 is an abundant number, since it is smaller than the sum of its proper divisors (11154318).

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

9979986 is a wasteful number, since it uses less digits than its factorization.

9979986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97865.

The product of its digits is 2204496, while the sum is 57.

The square root of 9979986 is about 3159.1115839742. Note that the first 3 decimals coincide. The cubic root of 9979986 is about 215.2996434901.

The spelling of 9979986 in words is "nine million, nine hundred seventy-nine thousand, nine hundred eighty-six".

Divisors: 1 2 3 6 17 34 51 102 97843 195686 293529 587058 1663331 3326662 4989993 9979986