2897131440 has 80 divisors (see below), whose sum is σ = 10264128768. Its totient is φ = 662201088.

The previous prime is 2897131439. The next prime is 2897131469. The reversal of 2897131440 is 441317982.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860562 + ... + 863921.

Almost surely, 2^2897131440 is an apocalyptic number.

2897131440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2897131440 is an abundant number, since it is smaller than the sum of its proper divisors (7366997328).

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

2897131440 is a wasteful number, since it uses less digits than its factorization.

2897131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724506 (or 1724500 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 2897131440 is about 53825.0075708309. The cubic root of 2897131440 is about 1425.5727977341.

The spelling of 2897131440 in words is "two billion, eight hundred ninety-seven million, one hundred thirty-one thousand, four hundred forty".