52742640 has 40 divisors (see below), whose sum is σ = 163502928. Its totient is φ = 14064640.

The previous prime is 52742633. The next prime is 52742659. The reversal of 52742640 is 4624725.

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

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 = 52742598 and 52742607.

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, 109641 + ... + 110120.

Almost surely, 2^52742640 is an apocalyptic number.

It is an amenable number.

52742640 is an abundant number, since it is smaller than the sum of its proper divisors (110760288).

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

52742640 is a wasteful number, since it uses less digits than its factorization.

52742640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219777 (or 219771 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 52742640 is about 7262.4128221962. The cubic root of 52742640 is about 375.0195900877.

The spelling of 52742640 in words is "fifty-two million, seven hundred forty-two thousand, six hundred forty".