78507492 has 24 divisors (see below), whose sum is σ = 209353536. Its totient is φ = 22430688.

The previous prime is 78507491. The next prime is 78507521. The reversal of 78507492 is 29470587.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78507491) 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, 467223 + ... + 467390.

It is an arithmetic number, because the mean of its divisors is an integer number (8723064).

Almost surely, 2^78507492 is an apocalyptic number.

It is an amenable number.

78507492 is an abundant number, since it is smaller than the sum of its proper divisors (130846044).

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

78507492 is a wasteful number, since it uses less digits than its factorization.

78507492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934627 (or 934625 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 78507492 is about 8860.4453612671. The cubic root of 78507492 is about 428.1905068002.

The spelling of 78507492 in words is "seventy-eight million, five hundred seven thousand, four hundred ninety-two".