78423650 has 24 divisors (see below), whose sum is σ = 146133504. Its totient is φ = 31312400.

The previous prime is 78423641. The next prime is 78423673. The reversal of 78423650 is 5632487.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78423650.

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, 36095 + ... + 38205.

It is an arithmetic number, because the mean of its divisors is an integer number (6088896).

Almost surely, 2^78423650 is an apocalyptic number.

78423650 is a deficient number, since it is larger than the sum of its proper divisors (67709854).

78423650 is a wasteful number, since it uses less digits than its factorization.

78423650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 78423650 is about 8855.7128453897. The cubic root of 78423650 is about 428.0380239604.

The spelling of 78423650 in words is "seventy-eight million, four hundred twenty-three thousand, six hundred fifty".