78496390 has 16 divisors (see below), whose sum is σ = 161478432. Its totient is φ = 26913024.

The previous prime is 78496387. The next prime is 78496409. The reversal of 78496390 is 9369487.

It is a self number, because there is not a number n which added to its sum of digits gives 78496390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560619 + ... + 560758.

It is an arithmetic number, because the mean of its divisors is an integer number (10092402).

Almost surely, 2^78496390 is an apocalyptic number.

78496390 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78496390 is an abundant number, since it is smaller than the sum of its proper divisors (82982042).

78496390 is a wasteful number, since it uses less digits than its factorization.

78496390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121391.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 78496390 is about 8859.8188469065. The cubic root of 78496390 is about 428.1703219109.

The spelling of 78496390 in words is "seventy-eight million, four hundred ninety-six thousand, three hundred ninety".