25720090 has 32 divisors (see below), whose sum is σ = 51212736. Its totient is φ = 9221760.

The previous prime is 25720087. The next prime is 25720103. The reversal of 25720090 is 9002752.

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, 6429 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (1600398).

Almost surely, 2^25720090 is an apocalyptic number.

25720090 is a deficient number, since it is larger than the sum of its proper divisors (25492646).

25720090 is a wasteful number, since it uses less digits than its factorization.

25720090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 25720090 is about 5071.4978063684. The cubic root of 25720090 is about 295.1826504616.

The spelling of 25720090 in words is "twenty-five million, seven hundred twenty thousand, ninety".