979764478 has 64 divisors (see below), whose sum is σ = 1920153600. Its totient is φ = 363767040.

The previous prime is 979764473. The next prime is 979764509. The reversal of 979764478 is 874467979.

It is a super-2 number, since 2×979764478² = 1919876864701224968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (61) 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 not an unprimeable number, because it can be changed into a prime (979764473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351426 + ... + 354202.

It is an arithmetic number, because the mean of its divisors is an integer number (30002400).

Almost surely, 2^979764478 is an apocalyptic number.

979764478 is a deficient number, since it is larger than the sum of its proper divisors (940389122).

979764478 is a wasteful number, since it uses less digits than its factorization.

979764478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905.

The product of its digits is 21337344, while the sum is 61.

The square root of 979764478 is about 31301.1897217981. The cubic root of 979764478 is about 993.2088101442.

The spelling of 979764478 in words is "nine hundred seventy-nine million, seven hundred sixty-four thousand, four hundred seventy-eight".