939491380 has 24 divisors (see below), whose sum is σ = 1973920032. Its totient is φ = 375608352.

The previous prime is 939491341. The next prime is 939491381. The reversal of 939491380 is 83194939.

It is a self number, because there is not a number n which added to its sum of digits gives 939491380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939491381) by changing a digit.

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, 33399 + ... + 54721.

It is an arithmetic number, because the mean of its divisors is an integer number (82246668).

Almost surely, 2^939491380 is an apocalyptic number.

It is an amenable number.

939491380 is an abundant number, since it is smaller than the sum of its proper divisors (1034428652).

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

939491380 is a wasteful number, since it uses less digits than its factorization.

939491380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23535 (or 23533 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 939491380 is about 30651.1236335636. The cubic root of 939491380 is about 979.4093970218.

The spelling of 939491380 in words is "nine hundred thirty-nine million, four hundred ninety-one thousand, three hundred eighty".