78444324 has 72 divisors (see below), whose sum is σ = 239960448. Its totient is φ = 21093120.

The previous prime is 78444319. The next prime is 78444347. The reversal of 78444324 is 42344487.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4872 + ... + 13439.

It is an arithmetic number, because the mean of its divisors is an integer number (3332784).

Almost surely, 2^78444324 is an apocalyptic number.

It is an amenable number.

78444324 is an abundant number, since it is smaller than the sum of its proper divisors (161516124).

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

78444324 is a wasteful number, since it uses less digits than its factorization.

78444324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18345 (or 18340 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 78444324 is about 8856.8800375753. The cubic root of 78444324 is about 428.0756337062.

The spelling of 78444324 in words is "seventy-eight million, four hundred forty-four thousand, three hundred twenty-four".