25575580 has 12 divisors (see below), whose sum is σ = 53708760. Its totient is φ = 10230224.

The previous prime is 25575569. The next prime is 25575581. The reversal of 25575580 is 8557552.

It is a super-2 number, since 2×25575580² = 1308220584672800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25575581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639370 + ... + 639409.

It is an arithmetic number, because the mean of its divisors is an integer number (4475730).

Almost surely, 2^25575580 is an apocalyptic number.

25575580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25575580 is an abundant number, since it is smaller than the sum of its proper divisors (28133180).

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

25575580 is a wasteful number, since it uses less digits than its factorization.

25575580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278788 (or 1278786 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 25575580 is about 5057.2304673606. The cubic root of 25575580 is about 294.6287775265.

The spelling of 25575580 in words is "twenty-five million, five hundred seventy-five thousand, five hundred eighty".