2644040428 has 12 divisors (see below), whose sum is σ = 4627472920. Its totient is φ = 1321905312.

The previous prime is 2644040407. The next prime is 2644040449. The reversal of 2644040428 is 8240404462.

It is an interprime number because it is at equal distance from previous prime (2644040407) and next prime (2644040449).

It is a junction number, because it is equal to n+sod(n) for n = 2644040393 and 2644040402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42883 + ... + 84421.

Almost surely, 2^2644040428 is an apocalyptic number.

It is an amenable number.

2644040428 is a deficient number, since it is larger than the sum of its proper divisors (1983432492).

2644040428 is a wasteful number, since it uses less digits than its factorization.

2644040428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57456 (or 57454 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 34.

The square root of 2644040428 is about 51420.2336439655. The cubic root of 2644040428 is about 1382.7893640713.

The spelling of 2644040428 in words is "two billion, six hundred forty-four million, forty thousand, four hundred twenty-eight".