391434012 has 48 divisors (see below), whose sum is σ = 1017357600. Its totient is φ = 130152960.

The previous prime is 391434007. The next prime is 391434047. The reversal of 391434012 is 210434193.

It is a super-2 number, since 2×391434012² = 306441171500832288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41164 + ... + 49772.

It is an arithmetic number, because the mean of its divisors is an integer number (21194950).

Almost surely, 2^391434012 is an apocalyptic number.

It is an amenable number.

391434012 is an abundant number, since it is smaller than the sum of its proper divisors (625923588).

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

391434012 is a wasteful number, since it uses less digits than its factorization.

391434012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043 (or 9035 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 391434012 is about 19784.6913546813. The cubic root of 391434012 is about 731.5087405224.

The spelling of 391434012 in words is "three hundred ninety-one million, four hundred thirty-four thousand, twelve".