391223464 has 16 divisors (see below), whose sum is σ = 735765120. Its totient is φ = 195019440.

The previous prime is 391223461. The next prime is 391223467. The reversal of 391223464 is 464322193.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (391223461) and next prime (391223467).

It is not an unprimeable number, because it can be changed into a prime (391223461) 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 3 ways as a sum of consecutive naturals, for example, 71224 + ... + 76519.

It is an arithmetic number, because the mean of its divisors is an integer number (45985320).

Almost surely, 2^391223464 is an apocalyptic number.

It is an amenable number.

391223464 is a deficient number, since it is larger than the sum of its proper divisors (344541656).

391223464 is a wasteful number, since it uses less digits than its factorization.

391223464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148080 (or 148076 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 391223464 is about 19779.3696562858. The cubic root of 391223464 is about 731.3775601951.

The spelling of 391223464 in words is "three hundred ninety-one million, two hundred twenty-three thousand, four hundred sixty-four".