53921658 has 80 divisors (see below), whose sum is σ = 133103520. Its totient is φ = 14521248.

The previous prime is 53921653. The next prime is 53921717. The reversal of 53921658 is 85612935.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (53921653) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 273616 + ... + 273812.

It is an arithmetic number, because the mean of its divisors is an integer number (1663794).

Almost surely, 2^53921658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53921658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66551760).

53921658 is an abundant number, since it is smaller than the sum of its proper divisors (79181862).

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

53921658 is a wasteful number, since it uses less digits than its factorization.

53921658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 228 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 53921658 is about 7343.1367956753. The cubic root of 53921658 is about 377.7934399568.

The spelling of 53921658 in words is "fifty-three million, nine hundred twenty-one thousand, six hundred fifty-eight".