25474640 has 40 divisors (see below), whose sum is σ = 59460480. Its totient is φ = 10150016.

The previous prime is 25474627. The next prime is 25474651. The reversal of 25474640 is 4647452.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 25474597 and 25474606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28277 + ... + 29163.

It is an arithmetic number, because the mean of its divisors is an integer number (1486512).

Almost surely, 2^25474640 is an apocalyptic number.

25474640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25474640 is an abundant number, since it is smaller than the sum of its proper divisors (33985840).

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

25474640 is a wasteful number, since it uses less digits than its factorization.

25474640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 25474640 is about 5047.2408303944. The cubic root of 25474640 is about 294.2406593831.

The spelling of 25474640 in words is "twenty-five million, four hundred seventy-four thousand, six hundred forty".