391397466 has 16 divisors (see below), whose sum is σ = 783057600. Its totient is φ = 130422048.

The previous prime is 391397459. The next prime is 391397471. The reversal of 391397466 is 664793193.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12190 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (48941100).

Almost surely, 2^391397466 is an apocalyptic number.

391397466 is an abundant number, since it is smaller than the sum of its proper divisors (391660134).

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

391397466 is a wasteful number, since it uses less digits than its factorization.

391397466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21893.

The product of its digits is 734832, while the sum is 48.

The square root of 391397466 is about 19783.7677402460. The cubic root of 391397466 is about 731.4859741900.

The spelling of 391397466 in words is "three hundred ninety-one million, three hundred ninety-seven thousand, four hundred sixty-six".