52454640 has 80 divisors (see below), whose sum is σ = 185845248. Its totient is φ = 11989248.

The previous prime is 52454629. The next prime is 52454663. The reversal of 52454640 is 4645425.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 52454598 and 52454607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13932 + ... + 17291.

Almost surely, 2^52454640 is an apocalyptic number.

It is an amenable number.

52454640 is an abundant number, since it is smaller than the sum of its proper divisors (133390608).

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

52454640 is a wasteful number, since it uses less digits than its factorization.

52454640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31246 (or 31240 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 52454640 is about 7242.5575593156. The cubic root of 52454640 is about 374.3357485258.

The spelling of 52454640 in words is "fifty-two million, four hundred fifty-four thousand, six hundred forty".