1939906380 has 96 divisors (see below), whose sum is σ = 5830259904. Its totient is φ = 480190464.

The previous prime is 1939906333. The next prime is 1939906387. The reversal of 1939906380 is 836099391.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1939906387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61434 + ... + 87486.

It is an arithmetic number, because the mean of its divisors is an integer number (60731874).

Almost surely, 2^1939906380 is an apocalyptic number.

1939906380 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 1939906380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2915129952).

1939906380 is an abundant number, since it is smaller than the sum of its proper divisors (3890353524).

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

1939906380 is a wasteful number, since it uses less digits than its factorization.

1939906380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26155 (or 26153 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 1939906380 is about 44044.3683119647. The cubic root of 1939906380 is about 1247.1736419099.

The spelling of 1939906380 in words is "one billion, nine hundred thirty-nine million, nine hundred six thousand, three hundred eighty".