391214412 has 72 divisors (see below), whose sum is σ = 1012087440. Its totient is φ = 127370880.

The previous prime is 391214377. The next prime is 391214419. The reversal of 391214412 is 214412193.

It is a happy number.

391214412 is a `hidden beast` number, since 39 + 1 + 214 + 412 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (391214419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722862 + ... + 723402.

It is an arithmetic number, because the mean of its divisors is an integer number (14056770).

Almost surely, 2^391214412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391214412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506043720).

391214412 is an abundant number, since it is smaller than the sum of its proper divisors (620873028).

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

391214412 is a wasteful number, since it uses less digits than its factorization.

391214412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 978 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 391214412 is about 19779.1408306832. The cubic root of 391214412 is about 731.3719193604.

The spelling of 391214412 in words is "three hundred ninety-one million, two hundred fourteen thousand, four hundred twelve".