78497328 has 80 divisors (see below), whose sum is σ = 249595136. Its totient is φ = 20701440.

The previous prime is 78497311. The next prime is 78497351. The reversal of 78497328 is 82379487.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4618 + ... + 13353.

Almost surely, 2^78497328 is an apocalyptic number.

78497328 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

78497328 is an abundant number, since it is smaller than the sum of its proper divisors (171097808).

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

78497328 is a wasteful number, since it uses less digits than its factorization.

78497328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18002 (or 17996 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 78497328 is about 8859.8717823680. The cubic root of 78497328 is about 428.1720273913.

78497328 divided by its sum of digits (48) gives a palindrome (1635361).

The spelling of 78497328 in words is "seventy-eight million, four hundred ninety-seven thousand, three hundred twenty-eight".