25793840 has 40 divisors (see below), whose sum is σ = 60183648. Its totient is φ = 10280960.

The previous prime is 25793821. The next prime is 25793843. The reversal of 25793840 is 4839752.

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 = 25793794 and 25793803.

It is not an unprimeable number, because it can be changed into a prime (25793843) 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, 39920 + ... + 40560.

Almost surely, 2^25793840 is an apocalyptic number.

25793840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25793840 is an abundant number, since it is smaller than the sum of its proper divisors (34389808).

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

25793840 is a wasteful number, since it uses less digits than its factorization.

25793840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 25793840 is about 5078.7636290735. The cubic root of 25793840 is about 295.4645176193.

The spelling of 25793840 in words is "twenty-five million, seven hundred ninety-three thousand, eight hundred forty".