25997370 has 64 divisors (see below), whose sum is σ = 72990720. Its totient is φ = 5802048.

The previous prime is 25997357. The next prime is 25997443. The reversal of 25997370 is 7379952.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 31 ways as a sum of consecutive naturals, for example, 7591 + ... + 10469.

It is an arithmetic number, because the mean of its divisors is an integer number (1140480).

Almost surely, 2^25997370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25997370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36495360).

25997370 is an abundant number, since it is smaller than the sum of its proper divisors (46993350).

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

25997370 is a wasteful number, since it uses less digits than its factorization.

25997370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939.

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

The square root of 25997370 is about 5098.7616143530. The cubic root of 25997370 is about 296.2396175749.

The spelling of 25997370 in words is "twenty-five million, nine hundred ninety-seven thousand, three hundred seventy".