78280304 has 20 divisors (see below), whose sum is σ = 159651240. Its totient is φ = 37080000.

The previous prime is 78280303. The next prime is 78280313. The reversal of 78280304 is 40308287.

It is a super-2 number, since 2×78280304² = 12255611988664832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78280303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128447 + ... + 129054.

It is an arithmetic number, because the mean of its divisors is an integer number (7982562).

Almost surely, 2^78280304 is an apocalyptic number.

It is an amenable number.

78280304 is an abundant number, since it is smaller than the sum of its proper divisors (81370936).

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

78280304 is a wasteful number, since it uses less digits than its factorization.

78280304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257528 (or 257522 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 78280304 is about 8847.6157240242. The cubic root of 78280304 is about 427.7770696839. Note that the first 3 decimals are identical.

The spelling of 78280304 in words is "seventy-eight million, two hundred eighty thousand, three hundred four".