78207792 has 120 divisors (see below), whose sum is σ = 226556928. Its totient is φ = 23212800.

The previous prime is 78207763. The next prime is 78207793. The reversal of 78207792 is 29770287.

It is a super-2 number, since 2×78207792² = 12232917459030528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78207793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251317 + ... + 251627.

Almost surely, 2^78207792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78207792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113278464).

78207792 is an abundant number, since it is smaller than the sum of its proper divisors (148349136).

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

78207792 is a wasteful number, since it uses less digits than its factorization.

78207792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 78207792 is about 8843.5169474593. The cubic root of 78207792 is about 427.6449438405.

The spelling of 78207792 in words is "seventy-eight million, two hundred seven thousand, seven hundred ninety-two".