2640030388 has 6 divisors (see below), whose sum is σ = 4620053186. Its totient is φ = 1320015192.

The previous prime is 2640030361. The next prime is 2640030397. The reversal of 2640030388 is 8830300462.

It can be written as a sum of positive squares in only one way, i.e., 1502182564 + 1137847824 = 38758^2 + 33732^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330003795 + ... + 330003802.

Almost surely, 2^2640030388 is an apocalyptic number.

It is an amenable number.

2640030388 is a deficient number, since it is larger than the sum of its proper divisors (1980022798).

2640030388 is a wasteful number, since it uses less digits than its factorization.

2640030388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660007601 (or 660007599 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 2640030388 is about 51381.2260266335. The cubic root of 2640030388 is about 1382.0899488592.

The spelling of 2640030388 in words is "two billion, six hundred forty million, thirty thousand, three hundred eighty-eight".