80897784 has 32 divisors (see below), whose sum is σ = 220631040. Its totient is φ = 24514400.

The previous prime is 80897783. The next prime is 80897809. The reversal of 80897784 is 48779808.

It is a super-2 number, since 2×80897784² = 13088902912221312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80897783) 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, 152952 + ... + 153479.

It is an arithmetic number, because the mean of its divisors is an integer number (6894720).

Almost surely, 2^80897784 is an apocalyptic number.

It is an amenable number.

80897784 is an abundant number, since it is smaller than the sum of its proper divisors (139733256).

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

80897784 is a wasteful number, since it uses less digits than its factorization.

80897784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306451 (or 306447 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 80897784 is about 8994.3195406879. The cubic root of 80897784 is about 432.4927932687.

The spelling of 80897784 in words is "eighty million, eight hundred ninety-seven thousand, seven hundred eighty-four".