1979644002 has 48 divisors (see below), whose sum is σ = 4611533472. Its totient is φ = 564896640.

The previous prime is 1979643983. The next prime is 1979644027. The reversal of 1979644002 is 2004469791.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255193 + ... + 262835.

It is an arithmetic number, because the mean of its divisors is an integer number (96073614).

Almost surely, 2^1979644002 is an apocalyptic number.

1979644002 is an abundant number, since it is smaller than the sum of its proper divisors (2631889470).

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

1979644002 is a wasteful number, since it uses less digits than its factorization.

1979644002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543 (or 8536 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1979644002 is about 44493.1905127065. The cubic root of 1979644002 is about 1255.6319736812.

The spelling of 1979644002 in words is "one billion, nine hundred seventy-nine million, six hundred forty-four thousand, two".