78406235224 has 32 divisors (see below), whose sum is σ = 147951760320. Its totient is φ = 38952557856.

The previous prime is 78406235209. The next prime is 78406235233. The reversal of 78406235224 is 42253260487.

It is a super-2 number, since 2×78406235224² (a number of 23 digits) contains 22 as substring.

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, 9962539 + ... + 9970405.

It is an arithmetic number, because the mean of its divisors is an integer number (4623492510).

Almost surely, 2^78406235224 is an apocalyptic number.

It is an amenable number.

78406235224 is a deficient number, since it is larger than the sum of its proper divisors (69545525096).

78406235224 is a wasteful number, since it uses less digits than its factorization.

78406235224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15679 (or 15675 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 78406235224 in words is "seventy-eight billion, four hundred six million, two hundred thirty-five thousand, two hundred twenty-four".