78497412 has 36 divisors (see below), whose sum is σ = 213066000. Its totient is φ = 22427664.

The previous prime is 78497389. The next prime is 78497431. The reversal of 78497412 is 21479487.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66162 + ... + 67337.

It is an arithmetic number, because the mean of its divisors is an integer number (5918500).

Almost surely, 2^78497412 is an apocalyptic number.

It is an amenable number.

78497412 is an abundant number, since it is smaller than the sum of its proper divisors (134568588).

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

78497412 is a wasteful number, since it uses less digits than its factorization.

78497412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133520 (or 133511 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 78497412 is about 8859.8765228416. The cubic root of 78497412 is about 428.1721801202.

The spelling of 78497412 in words is "seventy-eight million, four hundred ninety-seven thousand, four hundred twelve".