390297641 has 4 divisors (see below), whose sum is σ = 391044432. Its totient is φ = 389550852.

The previous prime is 390297569. The next prime is 390297643. The reversal of 390297641 is 146792093.

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 a de Polignac number, because none of the positive numbers 2^k-390297641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390297643) 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, 372611 + ... + 373656.

It is an arithmetic number, because the mean of its divisors is an integer number (97761108).

Almost surely, 2^390297641 is an apocalyptic number.

It is an amenable number.

390297641 is a deficient number, since it is larger than the sum of its proper divisors (746791).

390297641 is an equidigital number, since it uses as much as digits as its factorization.

390297641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746790.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 390297641 is about 19755.9520398284. The cubic root of 390297641 is about 730.8001740650.

The spelling of 390297641 in words is "three hundred ninety million, two hundred ninety-seven thousand, six hundred forty-one".