390491734 has 8 divisors (see below), whose sum is σ = 620192808. Its totient is φ = 183760800.

The previous prime is 390491719. The next prime is 390491741. The reversal of 390491734 is 437194093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5742492 + ... + 5742559.

It is an arithmetic number, because the mean of its divisors is an integer number (77524101).

Almost surely, 2^390491734 is an apocalyptic number.

390491734 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

390491734 is a deficient number, since it is larger than the sum of its proper divisors (229701074).

390491734 is a wasteful number, since it uses less digits than its factorization.

390491734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11485070.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 390491734 is about 19760.8636956991. The cubic root of 390491734 is about 730.9212950396.

The spelling of 390491734 in words is "three hundred ninety million, four hundred ninety-one thousand, seven hundred thirty-four".