25435988 has 6 divisors (see below), whose sum is σ = 44512986. Its totient is φ = 12717992.

The previous prime is 25435967. The next prime is 25436009. The reversal of 25435988 is 88953452.

It is an interprime number because it is at equal distance from previous prime (25435967) and next prime (25436009).

It can be written as a sum of positive squares in only one way, i.e., 25120144 + 315844 = 5012^2 + 562^2 .

It is a super-2 number, since 2×25435988² = 1293978971072288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3179495 + ... + 3179502.

It is an arithmetic number, because the mean of its divisors is an integer number (7418831).

Almost surely, 2^25435988 is an apocalyptic number.

It is an amenable number.

25435988 is a deficient number, since it is larger than the sum of its proper divisors (19076998).

25435988 is a wasteful number, since it uses less digits than its factorization.

25435988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6359001 (or 6358999 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 25435988 is about 5043.4103541156. The cubic root of 25435988 is about 294.0917695225.

The spelling of 25435988 in words is "twenty-five million, four hundred thirty-five thousand, nine hundred eighty-eight".