390028093 has 24 divisors (see below), whose sum is σ = 517362552. Its totient is φ = 290433024.

The previous prime is 390028087. The next prime is 390028097. The reversal of 390028093 is 390820093.

It can be written as a sum of positive squares in 4 ways, for example, as 46963609 + 343064484 = 6853^2 + 18522^2 .

It is not a de Polignac number, because 390028093 - 2⁹ = 390027581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390028097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7180 + ... + 28837.

It is an arithmetic number, because the mean of its divisors is an integer number (21556773).

Almost surely, 2^390028093 is an apocalyptic number.

It is an amenable number.

390028093 is a deficient number, since it is larger than the sum of its proper divisors (127334459).

390028093 is a wasteful number, since it uses less digits than its factorization.

390028093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36061 (or 36054 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 390028093 is about 19749.1289174991. The cubic root of 390028093 is about 730.6318998476.

The spelling of 390028093 in words is "three hundred ninety million, twenty-eight thousand, ninety-three".