25520770 has 16 divisors (see below), whose sum is σ = 50113728. Its totient is φ = 9280240.

The previous prime is 25520749. The next prime is 25520779. The reversal of 25520770 is 7702552.

It is not an unprimeable number, because it can be changed into a prime (25520779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115894 + ... + 116113.

It is an arithmetic number, because the mean of its divisors is an integer number (3132108).

Almost surely, 2^25520770 is an apocalyptic number.

25520770 is a deficient number, since it is larger than the sum of its proper divisors (24592958).

25520770 is a wasteful number, since it uses less digits than its factorization.

25520770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232025.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 25520770 is about 5051.8085870310. The cubic root of 25520770 is about 294.4181579582.

It can be divided in two parts, 255 and 20770, that added together give a square (21025 = 145²).

The spelling of 25520770 in words is "twenty-five million, five hundred twenty thousand, seven hundred seventy".