390428803 has 2 divisors, whose sum is σ = 390428804. Its totient is φ = 390428802.

The previous prime is 390428791. The next prime is 390428821. The reversal of 390428803 is 308824093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390428803 - 2¹⁷ = 390297731 is a prime.

It is not a weakly prime, because it can be changed into another prime (390428833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195214401 + 195214402.

It is an arithmetic number, because the mean of its divisors is an integer number (195214402).

Almost surely, 2^390428803 is an apocalyptic number.

390428803 is a deficient number, since it is larger than the sum of its proper divisors (1).

390428803 is an equidigital number, since it uses as much as digits as its factorization.

390428803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 390428803 is about 19759.2713175360. The cubic root of 390428803 is about 730.8820282424.

The spelling of 390428803 in words is "three hundred ninety million, four hundred twenty-eight thousand, eight hundred three".