1939381536 has 24 divisors (see below), whose sum is σ = 5090876784. Its totient is φ = 646460480.

The previous prime is 1939381511. The next prime is 1939381553. The reversal of 1939381536 is 6351839391.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1939381536² = 7522401484355438592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100850 + ... + 10101041.

It is an arithmetic number, because the mean of its divisors is an integer number (212119866).

Almost surely, 2^1939381536 is an apocalyptic number.

1939381536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1939381536 is an abundant number, since it is smaller than the sum of its proper divisors (3151495248).

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

1939381536 is a wasteful number, since it uses less digits than its factorization.

1939381536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201904 (or 20201896 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 1939381536 is about 44038.4097805541. The cubic root of 1939381536 is about 1247.0611569896.

The spelling of 1939381536 in words is "one billion, nine hundred thirty-nine million, three hundred eighty-one thousand, five hundred thirty-six".