80897840 has 40 divisors (see below), whose sum is σ = 188479008. Its totient is φ = 32291840.

The previous prime is 80897819. The next prime is 80897867. The reversal of 80897840 is 4879808.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 80897791 and 80897800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58760 + ... + 60120.

Almost surely, 2^80897840 is an apocalyptic number.

80897840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80897840 is an abundant number, since it is smaller than the sum of its proper divisors (107581168).

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

80897840 is a wasteful number, since it uses less digits than its factorization.

80897840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 80897840 is about 8994.3226537633. The cubic root of 80897840 is about 432.4928930637.

The spelling of 80897840 in words is "eighty million, eight hundred ninety-seven thousand, eight hundred forty".