390948311 has 4 divisors (see below), whose sum is σ = 421021272. Its totient is φ = 360875352.

The previous prime is 390948293. The next prime is 390948317. The reversal of 390948311 is 113849093.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 390948311 - 2¹⁴ = 390931927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390948317) 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, 15036461 + ... + 15036486.

It is an arithmetic number, because the mean of its divisors is an integer number (105255318).

Almost surely, 2^390948311 is an apocalyptic number.

390948311 is a deficient number, since it is larger than the sum of its proper divisors (30072961).

390948311 is a wasteful number, since it uses less digits than its factorization.

390948311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30072960.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 390948311 is about 19772.4128775423. The cubic root of 390948311 is about 731.2060572518.

The spelling of 390948311 in words is "three hundred ninety million, nine hundred forty-eight thousand, three hundred eleven".