80747992 has 32 divisors (see below), whose sum is σ = 164515680. Its totient is φ = 36933120.

The previous prime is 80747987. The next prime is 80747999. The reversal of 80747992 is 29974708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80747999) 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, 8317 + ... + 15187.

It is an arithmetic number, because the mean of its divisors is an integer number (5141115).

Almost surely, 2^80747992 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 80747992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82257840).

80747992 is an abundant number, since it is smaller than the sum of its proper divisors (83767688).

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

80747992 is a wasteful number, since it uses less digits than its factorization.

80747992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7003 (or 6999 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 80747992 is about 8985.9886490024. The cubic root of 80747992 is about 432.2256908275.

The spelling of 80747992 in words is "eighty million, seven hundred forty-seven thousand, nine hundred ninety-two".