1939159220 has 12 divisors (see below), whose sum is σ = 4072234404. Its totient is φ = 775663680.

The previous prime is 1939159207. The next prime is 1939159223. The reversal of 1939159220 is 229519391.

It can be written as a sum of positive squares in 2 ways, for example, as 400480144 + 1538679076 = 20012^2 + 39226^2 .

It is a super-2 number, since 2×1939159220² = 7520676961022016800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939159223) 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, 48478961 + ... + 48479000.

It is an arithmetic number, because the mean of its divisors is an integer number (339352867).

Almost surely, 2^1939159220 is an apocalyptic number.

1939159220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1939159220 is an abundant number, since it is smaller than the sum of its proper divisors (2133075184).

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

1939159220 is a wasteful number, since it uses less digits than its factorization.

1939159220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96957970 (or 96957968 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1939159220 is about 44035.8855934566. The cubic root of 1939159220 is about 1247.0135039557.

The spelling of 1939159220 in words is "one billion, nine hundred thirty-nine million, one hundred fifty-nine thousand, two hundred twenty".