52279978 has 4 divisors (see below), whose sum is σ = 78419970. Its totient is φ = 26139988.

The previous prime is 52279973. The next prime is 52279979. The reversal of 52279978 is 87997225.

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

It can be written as a sum of positive squares in only one way, i.e., 27846729 + 24433249 = 5277^2 + 4943^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (52279973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069993 + ... + 13069996.

Almost surely, 2^52279978 is an apocalyptic number.

52279978 is a deficient number, since it is larger than the sum of its proper divisors (26139992).

52279978 is a wasteful number, since it uses less digits than its factorization.

52279978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139991.

The product of its digits is 635040, while the sum is 49.

The square root of 52279978 is about 7230.4894716748. The cubic root of 52279978 is about 373.9198022634.

The spelling of 52279978 in words is "fifty-two million, two hundred seventy-nine thousand, nine hundred seventy-eight".