78994554 has 16 divisors (see below), whose sum is σ = 158864160. Its totient is φ = 26185680.

The previous prime is 78994547. The next prime is 78994567. The reversal of 78994554 is 45549987.

It is a junction number, because it is equal to n+sod(n) for n = 78994497 and 78994506.

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, 35284 + ... + 37455.

It is an arithmetic number, because the mean of its divisors is an integer number (9929010).

Almost surely, 2^78994554 is an apocalyptic number.

78994554 is an abundant number, since it is smaller than the sum of its proper divisors (79869606).

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

78994554 is a wasteful number, since it uses less digits than its factorization.

78994554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72925.

The product of its digits is 1814400, while the sum is 51.

The square root of 78994554 is about 8887.8880506001. Note that the first 3 decimals coincide. The cubic root of 78994554 is about 429.0741825955.

The spelling of 78994554 in words is "seventy-eight million, nine hundred ninety-four thousand, five hundred fifty-four".