80407840 has 24 divisors (see below), whose sum is σ = 189963900. Its totient is φ = 32163072.

The previous prime is 80407819. The next prime is 80407843. The reversal of 80407840 is 4870408.

It can be written as a sum of positive squares in 2 ways, for example, as 74857104 + 5550736 = 8652^2 + 2356^2 .

It is not an unprimeable number, because it can be changed into a prime (80407843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251115 + ... + 251434.

Almost surely, 2^80407840 is an apocalyptic number.

80407840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80407840 is an abundant number, since it is smaller than the sum of its proper divisors (109556060).

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

80407840 is a wasteful number, since it uses less digits than its factorization.

80407840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502564 (or 502556 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 80407840 is about 8967.0418756689. The cubic root of 80407840 is about 431.6179177684.

The spelling of 80407840 in words is "eighty million, four hundred seven thousand, eight hundred forty".