1939664892 has 48 divisors (see below), whose sum is σ = 4941619200. Its totient is φ = 587266560.

The previous prime is 1939664891. The next prime is 1939664893. The reversal of 1939664892 is 2984669391.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1939664891) and next prime (1939664893).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939664891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163084 + ... + 174572.

It is an arithmetic number, because the mean of its divisors is an integer number (102950400).

Almost surely, 2^1939664892 is an apocalyptic number.

1939664892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1939664892 is an abundant number, since it is smaller than the sum of its proper divisors (3001954308).

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

1939664892 is a wasteful number, since it uses less digits than its factorization.

1939664892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12786 (or 12784 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 57.

The square root of 1939664892 is about 44041.6268091904. The cubic root of 1939664892 is about 1247.1218885590.

The spelling of 1939664892 in words is "one billion, nine hundred thirty-nine million, six hundred sixty-four thousand, eight hundred ninety-two".