53400478 has 4 divisors (see below), whose sum is σ = 80100720. Its totient is φ = 26700238.

The previous prime is 53400467. The next prime is 53400481. The reversal of 53400478 is 87400435.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×53400478² = 5703222101256968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13350118 + ... + 13350121.

It is an arithmetic number, because the mean of its divisors is an integer number (20025180).

Almost surely, 2^53400478 is an apocalyptic number.

53400478 is a deficient number, since it is larger than the sum of its proper divisors (26700242).

53400478 is a wasteful number, since it uses less digits than its factorization.

53400478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26700241.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 53400478 is about 7307.5630684928. The cubic root of 53400478 is about 376.5723091847.

The spelling of 53400478 in words is "fifty-three million, four hundred thousand, four hundred seventy-eight".