52420740 has 48 divisors (see below), whose sum is σ = 148307712. Its totient is φ = 13833216.

The previous prime is 52420729. The next prime is 52420757. The reversal of 52420740 is 4702425.

It is a self number, because there is not a number n which added to its sum of digits gives 52420740.

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, 1317 + ... + 10323.

It is an arithmetic number, because the mean of its divisors is an integer number (3089744).

Almost surely, 2^52420740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52420740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74153856).

52420740 is an abundant number, since it is smaller than the sum of its proper divisors (95886972).

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

52420740 is a wasteful number, since it uses less digits than its factorization.

52420740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9116 (or 9114 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 52420740 is about 7240.2168475813. The cubic root of 52420740 is about 374.2550901602.

The spelling of 52420740 in words is "fifty-two million, four hundred twenty thousand, seven hundred forty".