52065390 has 64 divisors (see below), whose sum is σ = 142502976. Its totient is φ = 12060672.

The previous prime is 52065341. The next prime is 52065397. The reversal of 52065390 is 9356025.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52065397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2704 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (2226609).

Almost surely, 2^52065390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52065390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71251488).

52065390 is an abundant number, since it is smaller than the sum of its proper divisors (90437586).

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

52065390 is a wasteful number, since it uses less digits than its factorization.

52065390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 52065390 is about 7215.6351071822. The cubic root of 52065390 is about 373.4075045730.

The spelling of 52065390 in words is "fifty-two million, sixty-five thousand, three hundred ninety".