78911954 has 8 divisors (see below), whose sum is σ = 129128688. Its totient is φ = 35869060.

The previous prime is 78911953. The next prime is 78911981. The reversal of 78911954 is 45911987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78911953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1793432 + ... + 1793475.

It is an arithmetic number, because the mean of its divisors is an integer number (16141086).

Almost surely, 2^78911954 is an apocalyptic number.

78911954 is a deficient number, since it is larger than the sum of its proper divisors (50216734).

78911954 is a wasteful number, since it uses less digits than its factorization.

78911954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586920.

The product of its digits is 90720, while the sum is 44.

The square root of 78911954 is about 8883.2400620494. The cubic root of 78911954 is about 428.9245778193.

The spelling of 78911954 in words is "seventy-eight million, nine hundred eleven thousand, nine hundred fifty-four".