53649568 has 48 divisors (see below), whose sum is σ = 123016320. Its totient is φ = 22553856.

The previous prime is 53649553. The next prime is 53649571. The reversal of 53649568 is 86594635.

It is a super-2 number, since 2×53649568² = 5756552293173248, which contains 22 as substring.

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, 9613 + ... + 14131.

It is an arithmetic number, because the mean of its divisors is an integer number (2562840).

Almost surely, 2^53649568 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 53649568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61508160).

53649568 is an abundant number, since it is smaller than the sum of its proper divisors (69366752).

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

53649568 is a wasteful number, since it uses less digits than its factorization.

53649568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589 (or 4581 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The square root of 53649568 is about 7324.5865412322. The cubic root of 53649568 is about 377.1569164814.

The spelling of 53649568 in words is "fifty-three million, six hundred forty-nine thousand, five hundred sixty-eight".