25158720 has 112 divisors (see below), whose sum is σ = 81198720. Its totient is φ = 6598656.

The previous prime is 25158719. The next prime is 25158733. The reversal of 25158720 is 2785152.

It is a super-2 number, since 2×25158720² = 1265922384076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69901 + ... + 70259.

Almost surely, 2^25158720 is an apocalyptic number.

25158720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40599360).

25158720 is an abundant number, since it is smaller than the sum of its proper divisors (56040000).

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

25158720 is a wasteful number, since it uses less digits than its factorization.

25158720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25158720 is about 5015.8468876153. The cubic root of 25158720 is about 293.0192690019.

It can be divided in two parts, 25158 and 720, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 25158720 in words is "twenty-five million, one hundred fifty-eight thousand, seven hundred twenty".