28659402 has 24 divisors (see below), whose sum is σ = 62846784. Its totient is φ = 9437544.

The previous prime is 28659377. The next prime is 28659409. The reversal of 28659402 is 20495682.

It is a happy number.

It is a super-2 number, since 2×28659402² = 1642722645995208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28659409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8098 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (2618616).

Almost surely, 2^28659402 is an apocalyptic number.

28659402 is an abundant number, since it is smaller than the sum of its proper divisors (34187382).

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

28659402 is a wasteful number, since it uses less digits than its factorization.

28659402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19274 (or 19271 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28659402 is about 5353.4476741629. The cubic root of 28659402 is about 306.0241554685.

The spelling of 28659402 in words is "twenty-eight million, six hundred fifty-nine thousand, four hundred two".