28207946390 has 16 divisors (see below), whose sum is σ = 54680019408. Its totient is φ = 10415241696.

The previous prime is 28207946381. The next prime is 28207946401. The reversal of 28207946390 is 9364970282.

It is a super-2 number, since 2×28207946390² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108491972 + ... + 108492231.

It is an arithmetic number, because the mean of its divisors is an integer number (3417501213).

Almost surely, 2^28207946390 is an apocalyptic number.

28207946390 is a deficient number, since it is larger than the sum of its proper divisors (26472073018).

28207946390 is a wasteful number, since it uses less digits than its factorization.

28207946390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216984223.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 28207946390 in words is "twenty-eight billion, two hundred seven million, nine hundred forty-six thousand, three hundred ninety".