1979669394 has 48 divisors (see below), whose sum is σ = 4522109280. Its totient is φ = 624179520.

The previous prime is 1979669371. The next prime is 1979669429. The reversal of 1979669394 is 4939669791.

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, 232134 + ... + 240510.

It is an arithmetic number, because the mean of its divisors is an integer number (94210610).

Almost surely, 2^1979669394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979669394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2261054640).

1979669394 is an abundant number, since it is smaller than the sum of its proper divisors (2542439886).

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

1979669394 is a wasteful number, since it uses less digits than its factorization.

1979669394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9095 (or 9092 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The square root of 1979669394 is about 44493.4758588268. The cubic root of 1979669394 is about 1255.6373421330.

The spelling of 1979669394 in words is "one billion, nine hundred seventy-nine million, six hundred sixty-nine thousand, three hundred ninety-four".