52978387 has 8 divisors (see below), whose sum is σ = 66051072. Its totient is φ = 41281800.

The previous prime is 52978381. The next prime is 52978391. The reversal of 52978387 is 78387925.

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

It is not a de Polignac number, because 52978387 - 2³ = 52978379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52978387.

It is not an unprimeable number, because it can be changed into a prime (52978381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343939 + ... + 344092.

It is an arithmetic number, because the mean of its divisors is an integer number (8256384).

Almost surely, 2^52978387 is an apocalyptic number.

52978387 is a deficient number, since it is larger than the sum of its proper divisors (13072685).

52978387 is a wasteful number, since it uses less digits than its factorization.

52978387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688049.

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

The square root of 52978387 is about 7278.6253509849. The cubic root of 52978387 is about 375.5775089806.

The spelling of 52978387 in words is "fifty-two million, nine hundred seventy-eight thousand, three hundred eighty-seven".