390277 has 4 divisors (see below), whose sum is σ = 391680. Its totient is φ = 388876.

The previous prime is 390263. The next prime is 390281. The reversal of 390277 is 772093.

It is a happy number.

390277 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

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.

It is a cyclic number.

It is not a de Polignac number, because 390277 - 2¹⁵ = 357509 is a prime.

It is a super-2 number, since 2×390277² = 304632273458, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390077) 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, 127 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2³⁹⁰²⁷⁷ is an apocalyptic number.

It is an amenable number.

390277 is a deficient number, since it is larger than the sum of its proper divisors (1403).

390277 is a wasteful number, since it uses less digits than its factorization.

390277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 390277 is about 624.7215379671. The cubic root of 390277 is about 73.0787290981.

The spelling of 390277 in words is "three hundred ninety thousand, two hundred seventy-seven".