28570146 has 32 divisors (see below), whose sum is σ = 63790848. Its totient is φ = 8455440.

The previous prime is 28570123. The next prime is 28570169. The reversal of 28570146 is 64107582.

It is an interprime number because it is at equal distance from previous prime (28570123) and next prime (28570169).

It is a super-2 number, since 2×28570146² = 1632506484922632, which contains 22 as substring.

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

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 15 ways as a sum of consecutive naturals, for example, 2196 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (1993464).

Almost surely, 2^28570146 is an apocalyptic number.

28570146 is an abundant number, since it is smaller than the sum of its proper divisors (35220702).

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

28570146 is a wasteful number, since it uses less digits than its factorization.

28570146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28570146 is about 5345.1048633306. The cubic root of 28570146 is about 305.7061342132.

The spelling of 28570146 in words is "twenty-eight million, five hundred seventy thousand, one hundred forty-six".