78008404 has 24 divisors (see below), whose sum is σ = 140950656. Its totient is φ = 37752000.

The previous prime is 78008401. The next prime is 78008449. The reversal of 78008404 is 40480087.

It is a super-2 number, since 2×78008404² = 12170622189254432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78008401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19669 + ... + 23299.

It is an arithmetic number, because the mean of its divisors is an integer number (5872944).

Almost surely, 2^78008404 is an apocalyptic number.

It is an amenable number.

78008404 is a deficient number, since it is larger than the sum of its proper divisors (62942252).

78008404 is a wasteful number, since it uses less digits than its factorization.

78008404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 78008404 is about 8832.2366363226. The cubic root of 78008404 is about 427.2812126715.

The spelling of 78008404 in words is "seventy-eight million, eight thousand, four hundred four".