25397790 has 32 divisors (see below), whose sum is σ = 66496896. Its totient is φ = 6156960.

The previous prime is 25397783. The next prime is 25397791. The reversal of 25397790 is 9779352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397791) by changing a digit.

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, 38152 + ... + 38811.

It is an arithmetic number, because the mean of its divisors is an integer number (2078028).

Almost surely, 2^25397790 is an apocalyptic number.

25397790 is an abundant number, since it is smaller than the sum of its proper divisors (41099106).

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

25397790 is a wasteful number, since it uses less digits than its factorization.

25397790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76984.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 25397790 is about 5039.6220096352. The cubic root of 25397790 is about 293.9444802376.

The spelling of 25397790 in words is "twenty-five million, three hundred ninety-seven thousand, seven hundred ninety".