1979379870 has 256 divisors, whose sum is σ = 5690539008. Its totient is φ = 436101120.

The previous prime is 1979379841. The next prime is 1979379881. The reversal of 1979379870 is 789739791.

It is a happy number.

It is a super-2 number, since 2×1979379870² = 7835889339522433800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15109705 + ... + 15109835.

It is an arithmetic number, because the mean of its divisors is an integer number (22228668).

Almost surely, 2^1979379870 is an apocalyptic number.

1979379870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979379870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2845269504).

1979379870 is an abundant number, since it is smaller than the sum of its proper divisors (3711159138).

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

1979379870 is a wasteful number, since it uses less digits than its factorization.

1979379870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267.

The product of its (nonzero) digits is 6001128, while the sum is 60.

The square root of 1979379870 is about 44490.2221842058. Note that the first 3 decimals coincide. The cubic root of 1979379870 is about 1255.5761273884.

The spelling of 1979379870 in words is "one billion, nine hundred seventy-nine million, three hundred seventy-nine thousand, eight hundred seventy".