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28428714 = 23212311283
BaseRepresentation
bin110110001110…
…0100110101010
31222111022212100
41230130212222
524234204324
62453154230
7463432356
oct154344652
958438770
1028428714
1115057a06
12962b976
135b74a32
143ac0466
1527684c9
hex1b1c9aa

28428714 has 24 divisors (see below), whose sum is σ = 61693632. Its totient is φ = 9461160.

The previous prime is 28428689. The next prime is 28428739. The reversal of 28428714 is 41782482.

It is an interprime number because it is at equal distance from previous prime (28428689) and next prime (28428739).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21517 + ... + 22799.

It is an arithmetic number, because the mean of its divisors is an integer number (2570568).

Almost surely, 228428714 is an apocalyptic number.

28428714 is an abundant number, since it is smaller than the sum of its proper divisors (33264918).

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

28428714 is a wasteful number, since it uses less digits than its factorization.

28428714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2519 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28428714 is about 5331.8584002203. The cubic root of 28428714 is about 305.2008495219.

The spelling of 28428714 in words is "twenty-eight million, four hundred twenty-eight thousand, seven hundred fourteen".

Divisors: 1 2 3 6 9 18 1231 1283 2462 2566 3693 3849 7386 7698 11079 11547 22158 23094 1579373 3158746 4738119 9476238 14214357 28428714