1979208380 has 12 divisors (see below), whose sum is σ = 4156337640. Its totient is φ = 791683344.

The previous prime is 1979208347. The next prime is 1979208383. The reversal of 1979208380 is 838029791.

It is a super-2 number, since 2×1979208380² = 7834531622924448800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979208383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49480190 + ... + 49480229.

It is an arithmetic number, because the mean of its divisors is an integer number (346361470).

Almost surely, 2^1979208380 is an apocalyptic number.

1979208380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979208380 is an abundant number, since it is smaller than the sum of its proper divisors (2177129260).

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

1979208380 is a wasteful number, since it uses less digits than its factorization.

1979208380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98960428 (or 98960426 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1979208380 is about 44488.2948650541. The cubic root of 1979208380 is about 1255.5398660367.

The spelling of 1979208380 in words is "one billion, nine hundred seventy-nine million, two hundred eight thousand, three hundred eighty".