78099954 has 32 divisors (see below), whose sum is σ = 160579584. Its totient is φ = 25309200.

The previous prime is 78099941. The next prime is 78099961. The reversal of 78099954 is 45999087.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78099897 and 78099906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67279 + ... + 68429.

It is an arithmetic number, because the mean of its divisors is an integer number (5018112).

Almost surely, 2^78099954 is an apocalyptic number.

78099954 is an abundant number, since it is smaller than the sum of its proper divisors (82479630).

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

78099954 is a wasteful number, since it uses less digits than its factorization.

78099954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 78099954 is about 8837.4178355445. The cubic root of 78099954 is about 427.4482985251.

The spelling of 78099954 in words is "seventy-eight million, ninety-nine thousand, nine hundred fifty-four".