2391991932 has 24 divisors (see below), whose sum is σ = 6088707072. Its totient is φ = 724846000.

The previous prime is 2391991907. The next prime is 2391991933.

2391991932 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391991933) 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, 9060444 + ... + 9060707.

It is an arithmetic number, because the mean of its divisors is an integer number (253696128).

Almost surely, 2^2391991932 is an apocalyptic number.

2391991932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2391991932 is an abundant number, since it is smaller than the sum of its proper divisors (3696715140).

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

2391991932 is a wasteful number, since it uses less digits than its factorization.

2391991932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18121169 (or 18121167 counting only the distinct ones).

The product of its digits is 236196, while the sum is 48.

The square root of 2391991932 is about 48907.9945612167. The cubic root of 2391991932 is about 1337.3751117792.

The spelling of 2391991932 in words is "two billion, three hundred ninety-one million, nine hundred ninety-one thousand, nine hundred thirty-two".