25071988 has 12 divisors (see below), whose sum is σ = 44265060. Its totient is φ = 12424832.

The previous prime is 25071983. The next prime is 25072013. The reversal of 25071988 is 88917052.

It can be written as a sum of positive squares in 2 ways, for example, as 191844 + 24880144 = 438^2 + 4988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25071988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25071983) 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, 27283 + ... + 28186.

It is an arithmetic number, because the mean of its divisors is an integer number (3688755).

Almost surely, 2^25071988 is an apocalyptic number.

It is an amenable number.

25071988 is a deficient number, since it is larger than the sum of its proper divisors (19193072).

25071988 is a wasteful number, since it uses less digits than its factorization.

25071988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55586 (or 55584 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 25071988 is about 5007.1936251757. The cubic root of 25071988 is about 292.6821637823.

It can be divided in two parts, 250 and 71988, that multiplied together give a triangular number (17997000 = T₅₉₉₉).

The spelling of 25071988 in words is "twenty-five million, seventy-one thousand, nine hundred eighty-eight".