391311452 has 18 divisors (see below), whose sum is σ = 796598712. Its totient is φ = 167704824.

The previous prime is 391311451. The next prime is 391311467. The reversal of 391311452 is 254113193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391311451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 998048 + ... + 998439.

It is an arithmetic number, because the mean of its divisors is an integer number (44255484).

Almost surely, 2^391311452 is an apocalyptic number.

It is an amenable number.

391311452 is an abundant number, since it is smaller than the sum of its proper divisors (405287260).

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

391311452 is a wasteful number, since it uses less digits than its factorization.

391311452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996505 (or 1996496 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 391311452 is about 19781.5937679450. The cubic root of 391311452 is about 731.4323861713.

The spelling of 391311452 in words is "three hundred ninety-one million, three hundred eleven thousand, four hundred fifty-two".