78230404 has 12 divisors (see below), whose sum is σ = 156460864. Its totient is φ = 33527304.

The previous prime is 78230393. The next prime is 78230417. The reversal of 78230404 is 40403287.

78230404 is an admirable number.

It is a super-2 number, since 2×78230404² = 12239992220006432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2793943 = 78230404 / (7 + 8 + 2 + 3 + 0 + 4 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396944 + ... + 1396999.

Almost surely, 2^78230404 is an apocalyptic number.

It is an amenable number.

78230404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78230404 is a wasteful number, since it uses less digits than its factorization.

78230404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793954 (or 2793952 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 78230404 is about 8844.7953057151. The cubic root of 78230404 is about 427.6861544643.

The spelling of 78230404 in words is "seventy-eight million, two hundred thirty thousand, four hundred four".