78494970 has 32 divisors (see below), whose sum is σ = 188622720. Its totient is φ = 20905920.

The previous prime is 78494963. The next prime is 78494971. The reversal of 78494970 is 7949487.

It is a happy number.

It is a super-2 number, since 2×78494970² = 12322920630601800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78494971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41955 + ... + 43785.

It is an arithmetic number, because the mean of its divisors is an integer number (5894460).

Almost surely, 2^78494970 is an apocalyptic number.

78494970 is an abundant number, since it is smaller than the sum of its proper divisors (110127750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78494970 is a wasteful number, since it uses less digits than its factorization.

78494970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 78494970 is about 8859.7387094654. The cubic root of 78494970 is about 428.1677400278.

The spelling of 78494970 in words is "seventy-eight million, four hundred ninety-four thousand, nine hundred seventy".