390761 has 4 divisors (see below), whose sum is σ = 446592. Its totient is φ = 334932.

The previous prime is 390751. The next prime is 390763. The reversal of 390761 is 167093.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167093 = 17 ⋅9829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 390761.

It is not an unprimeable number, because it can be changed into a prime (390763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27905 + ... + 27918.

It is an arithmetic number, because the mean of its divisors is an integer number (111648).

2³⁹⁰⁷⁶¹ is an apocalyptic number.

It is an amenable number.

390761 is a deficient number, since it is larger than the sum of its proper divisors (55831).

390761 is an equidigital number, since it uses as much as digits as its factorization.

390761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55830.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 390761 is about 625.1087905317. The cubic root of 390761 is about 73.1089260211.

The spelling of 390761 in words is "three hundred ninety thousand, seven hundred sixty-one".