390747 has 16 divisors (see below), whose sum is σ = 622080. Its totient is φ = 213312.

The previous prime is 390743. The next prime is 390751. The reversal of 390747 is 747093.

It is an interprime number because it is at equal distance from previous prime (390743) and next prime (390751).

It is not a de Polignac number, because 390747 - 2² = 390743 is a prime.

390747 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (390743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79 + ... + 887.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2³⁹⁰⁷⁴⁷ is an apocalyptic number.

390747 is a deficient number, since it is larger than the sum of its proper divisors (231333).

390747 is a wasteful number, since it uses less digits than its factorization.

390747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 390747 is about 625.0975923806. The cubic root of 390747 is about 73.1080529067.

The spelling of 390747 in words is "three hundred ninety thousand, seven hundred forty-seven".