78940494 has 56 divisors (see below), whose sum is σ = 183755160. Its totient is φ = 25392528.

The previous prime is 78940493. The next prime is 78940567. The reversal of 78940494 is 49404987.

78940494 is a `hidden beast` number, since 78 + 94 + 0 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78940493) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 41349 + ... + 43215.

Almost surely, 2^78940494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78940494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91877580).

78940494 is an abundant number, since it is smaller than the sum of its proper divisors (104814666).

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

78940494 is a wasteful number, since it uses less digits than its factorization.

78940494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78940494 is about 8884.8463126832. The cubic root of 78940494 is about 428.9762811474.

The spelling of 78940494 in words is "seventy-eight million, nine hundred forty thousand, four hundred ninety-four".