78412244 has 24 divisors (see below), whose sum is σ = 145336128. Its totient is φ = 36938880.

The previous prime is 78412241. The next prime is 78412249. The reversal of 78412244 is 44221487.

It is a super-2 number, since 2×78412244² = 12296960018231072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78412244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78412241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (6055672).

Almost surely, 2^78412244 is an apocalyptic number.

It is an amenable number.

78412244 is a deficient number, since it is larger than the sum of its proper divisors (66923884).

78412244 is a wasteful number, since it uses less digits than its factorization.

78412244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815 (or 12813 counting only the distinct ones).

The product of its digits is 14336, while the sum is 32.

The square root of 78412244 is about 8855.0688309013. The cubic root of 78412244 is about 428.0172715539.

The spelling of 78412244 in words is "seventy-eight million, four hundred twelve thousand, two hundred forty-four".