78287296992 has 48 divisors (see below), whose sum is σ = 207622778832. Its totient is φ = 25826734080.

The previous prime is 78287296981. The next prime is 78287296999. The reversal of 78287296992 is 29969278287.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×78287296992² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78287296999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194259 + ... + 4212882.

It is an arithmetic number, because the mean of its divisors is an integer number (4325474559).

Almost surely, 2^78287296992 is an apocalyptic number.

It is an amenable number.

78287296992 is an abundant number, since it is smaller than the sum of its proper divisors (129335481840).

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

78287296992 is a wasteful number, since it uses less digits than its factorization.

78287296992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8407251 (or 8407243 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 69.

The spelling of 78287296992 in words is "seventy-eight billion, two hundred eighty-seven million, two hundred ninety-six thousand, nine hundred ninety-two".