391299132 has 48 divisors (see below), whose sum is σ = 1104848640. Its totient is φ = 105222912.

The previous prime is 391299131. The next prime is 391299133. The reversal of 391299132 is 231992193.

It is an interprime number because it is at equal distance from previous prime (391299131) and next prime (391299133).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391299131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135582 + ... + 138437.

It is an arithmetic number, because the mean of its divisors is an integer number (23017680).

Almost surely, 2^391299132 is an apocalyptic number.

It is an amenable number.

391299132 is an abundant number, since it is smaller than the sum of its proper divisors (713549508).

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

391299132 is a wasteful number, since it uses less digits than its factorization.

391299132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274050 (or 274048 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The square root of 391299132 is about 19781.2823649024. The cubic root of 391299132 is about 731.4247099827.

The spelling of 391299132 in words is "three hundred ninety-one million, two hundred ninety-nine thousand, one hundred thirty-two".