28651356 has 18 divisors (see below), whose sum is σ = 72424352. Its totient is φ = 9550440.

The previous prime is 28651349. The next prime is 28651361. The reversal of 28651356 is 65315682.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 795871 = 28651356 / (2 + 8 + 6 + 5 + 1 + 3 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 28651356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397900 + ... + 397971.

Almost surely, 2^28651356 is an apocalyptic number.

It is an amenable number.

28651356 is an abundant number, since it is smaller than the sum of its proper divisors (43772996).

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

28651356 is a wasteful number, since it uses less digits than its factorization.

28651356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795881 (or 795876 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 28651356 is about 5352.6961430666. The cubic root of 28651356 is about 305.9955144799.

The spelling of 28651356 in words is "twenty-eight million, six hundred fifty-one thousand, three hundred fifty-six".