53415978 has 96 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 13638240.

The previous prime is 53415961. The next prime is 53415979. The reversal of 53415978 is 87951435.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (53415979) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 268323 + ... + 268521.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^53415978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53415978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68947200).

53415978 is an abundant number, since it is smaller than the sum of its proper divisors (84478422).

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

53415978 is a wasteful number, since it uses less digits than its factorization.

53415978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 305 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 53415978 is about 7308.6235366175. The cubic root of 53415978 is about 376.6087402328.

The spelling of 53415978 in words is "fifty-three million, four hundred fifteen thousand, nine hundred seventy-eight".