25573320 has 112 divisors (see below), whose sum is σ = 86368860. Its totient is φ = 6811776.

The previous prime is 25573319. The next prime is 25573337. The reversal of 25573320 is 2337552.

It can be written as a sum of positive squares in 2 ways, for example, as 25220484 + 352836 = 5022^2 + 594^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 28722 + ... + 29598.

Almost surely, 2^25573320 is an apocalyptic number.

25573320 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 25573320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43184430).

25573320 is an abundant number, since it is smaller than the sum of its proper divisors (60795540).

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

25573320 is an equidigital number, since it uses as much as digits as its factorization.

25573320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 25573320 is about 5057.0070199674. The cubic root of 25573320 is about 294.6200989270.

The spelling of 25573320 in words is "twenty-five million, five hundred seventy-three thousand, three hundred twenty".