53783978 has 16 divisors (see below), whose sum is σ = 82301184. Its totient is φ = 26355840.

The previous prime is 53783963. The next prime is 53783981. The reversal of 53783978 is 87938735.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19463 + ... + 22053.

It is an arithmetic number, because the mean of its divisors is an integer number (5143824).

Almost surely, 2^53783978 is an apocalyptic number.

53783978 is a deficient number, since it is larger than the sum of its proper divisors (28517206).

53783978 is a wasteful number, since it uses less digits than its factorization.

53783978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797.

The product of its digits is 1270080, while the sum is 50.

The square root of 53783978 is about 7333.7560635734. The cubic root of 53783978 is about 377.4716216259.

The spelling of 53783978 in words is "fifty-three million, seven hundred eighty-three thousand, nine hundred seventy-eight".