53391408 has 80 divisors (see below), whose sum is σ = 158966016. Its totient is φ = 15125760.

The previous prime is 53391391. The next prime is 53391413. The reversal of 53391408 is 80419335.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43410 + ... + 44622.

Almost surely, 2^53391408 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 53391408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79483008).

53391408 is an abundant number, since it is smaller than the sum of its proper divisors (105574608).

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

53391408 is a wasteful number, since it uses less digits than its factorization.

53391408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 53391408 is about 7306.9424522162. The cubic root of 53391408 is about 376.5509878760.

The spelling of 53391408 in words is "fifty-three million, three hundred ninety-one thousand, four hundred eight".