78944901 has 32 divisors (see below), whose sum is σ = 127303680. Its totient is φ = 42539904.

The previous prime is 78944893. The next prime is 78944903. The reversal of 78944901 is 10944987.

It is not a de Polignac number, because 78944901 - 2³ = 78944893 is a prime.

It is a super-3 number, since 3×78944901³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78944903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34140 + ... + 36378.

It is an arithmetic number, because the mean of its divisors is an integer number (3978240).

Almost surely, 2^78944901 is an apocalyptic number.

It is an amenable number.

78944901 is a deficient number, since it is larger than the sum of its proper divisors (48358779).

78944901 is a wasteful number, since it uses less digits than its factorization.

78944901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 78944901 is about 8885.0943157628. The cubic root of 78944901 is about 428.9842637987.

The spelling of 78944901 in words is "seventy-eight million, nine hundred forty-four thousand, nine hundred one".