78519490 has 16 divisors (see below), whose sum is σ = 161525952. Its totient is φ = 26920944.

The previous prime is 78519479. The next prime is 78519509. The reversal of 78519490 is 9491587.

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, 560784 + ... + 560923.

It is an arithmetic number, because the mean of its divisors is an integer number (10095372).

Almost surely, 2^78519490 is an apocalyptic number.

78519490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78519490 is an abundant number, since it is smaller than the sum of its proper divisors (83006462).

78519490 is a wasteful number, since it uses less digits than its factorization.

78519490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121721.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 78519490 is about 8861.1223894042. The cubic root of 78519490 is about 428.2123185954.

The spelling of 78519490 in words is "seventy-eight million, five hundred nineteen thousand, four hundred ninety".