53613690 has 128 divisors (see below), whose sum is σ = 149022720. Its totient is φ = 12241152.

The previous prime is 53613671. The next prime is 53613697. The reversal of 53613690 is 9631635.

It is a super-2 number, since 2×53613690² = 5748855510832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53613697) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 385641 + ... + 385779.

It is an arithmetic number, because the mean of its divisors is an integer number (1164240).

Almost surely, 2^53613690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53613690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74511360).

53613690 is an abundant number, since it is smaller than the sum of its proper divisors (95409030).

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

53613690 is a wasteful number, since it uses less digits than its factorization.

53613690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 53613690 is about 7322.1369831491. The cubic root of 53613690 is about 377.0728235186.

The spelling of 53613690 in words is "fifty-three million, six hundred thirteen thousand, six hundred ninety".