2640690348 has 24 divisors (see below), whose sum is σ = 6162475200. Its totient is φ = 880106640.

The previous prime is 2640690337. The next prime is 2640690379. The reversal of 2640690348 is 8430960462.

It is a happy number.

It is a super-2 number, since 2×2640690348² = 13946491028040722208, which contains 22 as substring.

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, 124203 + ... + 143901.

It is an arithmetic number, because the mean of its divisors is an integer number (256769800).

Almost surely, 2^2640690348 is an apocalyptic number.

It is an amenable number.

2640690348 is an abundant number, since it is smaller than the sum of its proper divisors (3521784852).

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

2640690348 is a wasteful number, since it uses less digits than its factorization.

2640690348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30877 (or 30875 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 2640690348 is about 51387.6478154040. The cubic root of 2640690348 is about 1382.2051051206.

The spelling of 2640690348 in words is "two billion, six hundred forty million, six hundred ninety thousand, three hundred forty-eight".