28304920390 has 16 divisors (see below), whose sum is σ = 51069882960. Its totient is φ = 11295073440.

The previous prime is 28304920387. The next prime is 28304920411. The reversal of 28304920390 is 9302940382.

It is a super-3 number, since 3×28304920390³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3357420 + ... + 3365839.

It is an arithmetic number, because the mean of its divisors is an integer number (3191867685).

Almost surely, 2^28304920390 is an apocalyptic number.

28304920390 is a deficient number, since it is larger than the sum of its proper divisors (22764962570).

28304920390 is a wasteful number, since it uses less digits than its factorization.

28304920390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723687.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 28304920390 in words is "twenty-eight billion, three hundred four million, nine hundred twenty thousand, three hundred ninety".