80447292 has 72 divisors (see below), whose sum is σ = 215306000. Its totient is φ = 25256448.

The previous prime is 80447291. The next prime is 80447317. The reversal of 80447292 is 29274408.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80447291) 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, 230334 + ... + 230682.

Almost surely, 2^80447292 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 80447292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107653000).

80447292 is an abundant number, since it is smaller than the sum of its proper divisors (134858708).

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

80447292 is a wasteful number, since it uses less digits than its factorization.

80447292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 80447292 is about 8969.2414394975. The cubic root of 80447292 is about 431.6884971460.

The spelling of 80447292 in words is "eighty million, four hundred forty-seven thousand, two hundred ninety-two".