25570620 has 48 divisors (see below), whose sum is σ = 79554720. Its totient is φ = 6818688.

The previous prime is 25570603. The next prime is 25570621. The reversal of 25570620 is 2607552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25570621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23137 + ... + 24216.

It is an arithmetic number, because the mean of its divisors is an integer number (1657390).

Almost surely, 2^25570620 is an apocalyptic number.

25570620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25570620 is an abundant number, since it is smaller than the sum of its proper divisors (53984100).

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

25570620 is a wasteful number, since it uses less digits than its factorization.

25570620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47371 (or 47363 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 25570620 is about 5056.7400565977. The cubic root of 25570620 is about 294.6097300182.

The spelling of 25570620 in words is "twenty-five million, five hundred seventy thousand, six hundred twenty".