390628451 has 2 divisors, whose sum is σ = 390628452. Its totient is φ = 390628450.

The previous prime is 390628411. The next prime is 390628453. The reversal of 390628451 is 154826093.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390628451 is a prime.

Together with 390628453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (390628453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195314225 + 195314226.

It is an arithmetic number, because the mean of its divisors is an integer number (195314226).

Almost surely, 2^390628451 is an apocalyptic number.

390628451 is a deficient number, since it is larger than the sum of its proper divisors (1).

390628451 is an equidigital number, since it uses as much as digits as its factorization.

390628451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 390628451 is about 19764.3226800212. The cubic root of 390628451 is about 731.0065872477.

The spelling of 390628451 in words is "three hundred ninety million, six hundred twenty-eight thousand, four hundred fifty-one".