53782978 has 8 divisors (see below), whose sum is σ = 82854972. Its totient is φ = 26164656.

The previous prime is 53782961. The next prime is 53782987. The reversal of 53782978 is 87928735.

It can be written as a sum of positive squares in 2 ways, for example, as 46744569 + 7038409 = 6837^2 + 2653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×53782978³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363325 + ... + 363472.

Almost surely, 2^53782978 is an apocalyptic number.

53782978 is a deficient number, since it is larger than the sum of its proper divisors (29071994).

53782978 is a wasteful number, since it uses less digits than its factorization.

53782978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726836.

The product of its digits is 846720, while the sum is 49.

The square root of 53782978 is about 7333.6878853685. The cubic root of 53782978 is about 377.4692821810.

The spelling of 53782978 in words is "fifty-three million, seven hundred eighty-two thousand, nine hundred seventy-eight".