78001320 has 32 divisors (see below), whose sum is σ = 234004320. Its totient is φ = 20800320.

The previous prime is 78001307. The next prime is 78001409. The reversal of 78001320 is 2310087.

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 7 ways as a sum of consecutive naturals, for example, 324886 + ... + 325125.

It is an arithmetic number, because the mean of its divisors is an integer number (7312635).

Almost surely, 2^78001320 is an apocalyptic number.

It is an amenable number.

78001320 is an abundant number, since it is smaller than the sum of its proper divisors (156003000).

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

78001320 is a wasteful number, since it uses less digits than its factorization.

78001320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650025 (or 650021 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 78001320 is about 8831.8355962959. The cubic root of 78001320 is about 427.2682783739.

The spelling of 78001320 in words is "seventy-eight million, one thousand, three hundred twenty".