1939421500 has 24 divisors (see below), whose sum is σ = 4235697648. Its totient is φ = 775768400.

The previous prime is 1939421461. The next prime is 1939421537. The reversal of 1939421500 is 51249391.

It is a super-2 number, since 2×1939421500² = 7522711509324500000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938922 + ... + 1939921.

It is an arithmetic number, because the mean of its divisors is an integer number (176487402).

Almost surely, 2^1939421500 is an apocalyptic number.

1939421500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1939421500 is an abundant number, since it is smaller than the sum of its proper divisors (2296276148).

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

1939421500 is a wasteful number, since it uses less digits than its factorization.

1939421500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878862 (or 3878850 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1939421500 is about 44038.8635184878. The cubic root of 1939421500 is about 1247.0697228148.

The spelling of 1939421500 in words is "one billion, nine hundred thirty-nine million, four hundred twenty-one thousand, five hundred".