28810242 has 20 divisors (see below), whose sum is σ = 64556646. Its totient is φ = 9603360.

The previous prime is 28810207. The next prime is 28810247. The reversal of 28810242 is 24201882.

It can be written as a sum of positive squares in only one way, i.e., 23707161 + 5103081 = 4869^2 + 2259^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28810247) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 88759 + ... + 89082.

Almost surely, 2^28810242 is an apocalyptic number.

28810242 is an abundant number, since it is smaller than the sum of its proper divisors (35746404).

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

28810242 is a wasteful number, since it uses less digits than its factorization.

28810242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177855 (or 177846 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28810242 is about 5367.5173031859. The cubic root of 28810242 is about 306.5601044899.

The spelling of 28810242 in words is "twenty-eight million, eight hundred ten thousand, two hundred forty-two".