2297691640 has 32 divisors (see below), whose sum is σ = 5227902000. Its totient is φ = 908748544.

The previous prime is 2297691637. The next prime is 2297691647. The reversal of 2297691640 is 461967922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2297691647) 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, 319150 + ... + 326269.

Almost surely, 2^2297691640 is an apocalyptic number.

2297691640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2297691640 is an abundant number, since it is smaller than the sum of its proper divisors (2930210360).

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

2297691640 is a wasteful number, since it uses less digits than its factorization.

2297691640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645519 (or 645515 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 2297691640 is about 47934.2428750053. The cubic root of 2297691640 is about 1319.5643726256.

The spelling of 2297691640 in words is "two billion, two hundred ninety-seven million, six hundred ninety-one thousand, six hundred forty".