25605378 has 12 divisors (see below), whose sum is σ = 55478358. Its totient is φ = 8535120.

The previous prime is 25605343. The next prime is 25605379. The reversal of 25605378 is 87350652.

It can be written as a sum of positive squares in only one way, i.e., 21930489 + 3674889 = 4683^2 + 1917^2 .

It is not an unprimeable number, because it can be changed into a prime (25605379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711243 + ... + 711278.

Almost surely, 2^25605378 is an apocalyptic number.

25605378 is an abundant number, since it is smaller than the sum of its proper divisors (29872980).

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

25605378 is a wasteful number, since it uses less digits than its factorization.

25605378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422529 (or 1422526 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25605378 is about 5060.1756886496. The cubic root of 25605378 is about 294.7431566976.

The spelling of 25605378 in words is "twenty-five million, six hundred five thousand, three hundred seventy-eight".