28485402 has 16 divisors (see below), whose sum is σ = 62150112. Its totient is φ = 8631920.

The previous prime is 28485397. The next prime is 28485407. The reversal of 28485402 is 20458482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28485397) and next prime (28485407).

It is a super-2 number, since 2×28485402² = 1622836254203208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28485407) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 215733 + ... + 215864.

It is an arithmetic number, because the mean of its divisors is an integer number (3884382).

Almost surely, 2^28485402 is an apocalyptic number.

28485402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28485402 is an abundant number, since it is smaller than the sum of its proper divisors (33664710).

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

28485402 is a wasteful number, since it uses less digits than its factorization.

28485402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431613.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28485402 is about 5337.1717229259. The cubic root of 28485402 is about 305.4035757596.

The spelling of 28485402 in words is "twenty-eight million, four hundred eighty-five thousand, four hundred two".