25728290 has 16 divisors (see below), whose sum is σ = 52926912. Its totient is φ = 8821104.

The previous prime is 25728289. The next prime is 25728301. The reversal of 25728290 is 9282752.

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 25728290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183704 + ... + 183843.

It is an arithmetic number, because the mean of its divisors is an integer number (3307932).

Almost surely, 2^25728290 is an apocalyptic number.

25728290 is an abundant number, since it is smaller than the sum of its proper divisors (27198622).

25728290 is a wasteful number, since it uses less digits than its factorization.

25728290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367561.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 25728290 is about 5072.3061816101. The cubic root of 25728290 is about 295.2140168700.

The spelling of 25728290 in words is "twenty-five million, seven hundred twenty-eight thousand, two hundred ninety".