1939373820 has 96 divisors (see below), whose sum is σ = 6081331200. Its totient is φ = 513076032.

The previous prime is 1939373809. The next prime is 1939373851. The reversal of 1939373820 is 283739391.

It is a super-2 number, since 2×1939373820² = 7522341627402784800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54441 + ... + 82719.

It is an arithmetic number, because the mean of its divisors is an integer number (63347200).

Almost surely, 2^1939373820 is an apocalyptic number.

1939373820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1939373820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3040665600).

1939373820 is an abundant number, since it is smaller than the sum of its proper divisors (4141957380).

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

1939373820 is a wasteful number, since it uses less digits than its factorization.

1939373820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28424 (or 28416 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1939373820 is about 44038.3221751238. The cubic root of 1939373820 is about 1247.0595031399.

The spelling of 1939373820 in words is "one billion, nine hundred thirty-nine million, three hundred seventy-three thousand, eight hundred twenty".