28258370 has 32 divisors (see below), whose sum is σ = 58320000. Its totient is φ = 9657216.

The previous prime is 28258367. The next prime is 28258387. The reversal of 28258370 is 7385282.

28258370 = 1150² + 1151² + ... + 1170².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 28258370.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34526 + ... + 35334.

It is an arithmetic number, because the mean of its divisors is an integer number (1822500).

Almost surely, 2^28258370 is an apocalyptic number.

28258370 is an abundant number, since it is smaller than the sum of its proper divisors (30061630).

28258370 is a wasteful number, since it uses less digits than its factorization.

28258370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28258370 is about 5315.8602314207. The cubic root of 28258370 is about 304.5900431417.

The spelling of 28258370 in words is "twenty-eight million, two hundred fifty-eight thousand, three hundred seventy".