53407812 has 48 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 16576512.

The previous prime is 53407799. The next prime is 53407813. The reversal of 53407812 is 21870435.

It is a self number, because there is not a number n which added to its sum of digits gives 53407812.

It is not an unprimeable number, because it can be changed into a prime (53407813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18439 + ... + 21137.

It is an arithmetic number, because the mean of its divisors is an integer number (2778300).

Almost surely, 2^53407812 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 53407812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66679200).

53407812 is an abundant number, since it is smaller than the sum of its proper divisors (79950588).

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

53407812 is a wasteful number, since it uses less digits than its factorization.

53407812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 53407812 is about 7308.0648601391. The cubic root of 53407812 is about 376.5895478250.

The spelling of 53407812 in words is "fifty-three million, four hundred seven thousand, eight hundred twelve".