53921406 has 64 divisors (see below), whose sum is σ = 135659520. Its totient is φ = 13880160.

The previous prime is 53921393. The next prime is 53921471. The reversal of 53921406 is 60412935.

It is a congruent number.

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, 58215 + ... + 59133.

It is an arithmetic number, because the mean of its divisors is an integer number (2119680).

Almost surely, 2^53921406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53921406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67829760).

53921406 is an abundant number, since it is smaller than the sum of its proper divisors (81738114).

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

53921406 is a wasteful number, since it uses less digits than its factorization.

53921406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 53921406 is about 7343.1196367756. The cubic root of 53921406 is about 377.7928514234.

It can be divided in two parts, 539 and 21406, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 53921406 in words is "fifty-three million, nine hundred twenty-one thousand, four hundred six".