78360720 has 40 divisors (see below), whose sum is σ = 242918976. Its totient is φ = 20896128.

The previous prime is 78360707. The next prime is 78360727. The reversal of 78360720 is 2706387.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78360720² = 12280804877836800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78360727) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 163012 + ... + 163491.

Almost surely, 2^78360720 is an apocalyptic number.

It is an amenable number.

78360720 is an abundant number, since it is smaller than the sum of its proper divisors (164558256).

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

78360720 is a wasteful number, since it uses less digits than its factorization.

78360720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326519 (or 326513 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 78360720 is about 8852.1590586704. The cubic root of 78360720 is about 427.9235022102.

The spelling of 78360720 in words is "seventy-eight million, three hundred sixty thousand, seven hundred twenty".