53209764 has 96 divisors (see below), whose sum is σ = 148807680. Its totient is φ = 16394400.

The previous prime is 53209727. The next prime is 53209771. The reversal of 53209764 is 46790235.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76659 + ... + 77349.

It is an arithmetic number, because the mean of its divisors is an integer number (1550080).

Almost surely, 2^53209764 is an apocalyptic number.

53209764 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53209764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74403840).

53209764 is an abundant number, since it is smaller than the sum of its proper divisors (95597916).

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

53209764 is a wasteful number, since it uses less digits than its factorization.

53209764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 53209764 is about 7294.5023133864. The cubic root of 53209764 is about 376.1234787599.

Adding to 53209764 its reverse (46790235), we get a palindrome (99999999).

The spelling of 53209764 in words is "fifty-three million, two hundred nine thousand, seven hundred sixty-four".