78280772 has 12 divisors (see below), whose sum is σ = 138272400. Its totient is φ = 38774376.

The previous prime is 78280759. The next prime is 78280781. The reversal of 78280772 is 27708287.

It is a super-2 number, since 2×78280772² = 12255758529831968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91022 + ... + 91877.

It is an arithmetic number, because the mean of its divisors is an integer number (11522700).

Almost surely, 2^78280772 is an apocalyptic number.

It is an amenable number.

78280772 is a deficient number, since it is larger than the sum of its proper divisors (59991628).

78280772 is a wasteful number, since it uses less digits than its factorization.

78280772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183010 (or 183008 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 78280772 is about 8847.6421717879. The cubic root of 78280772 is about 427.7779221728. Note that the first 3 decimals are identical.

The spelling of 78280772 in words is "seventy-eight million, two hundred eighty thousand, seven hundred seventy-two".