28057547066390 has 32 divisors (see below), whose sum is σ = 50785075897920. Its totient is φ = 11160471254400.

The previous prime is 28057547066389. The next prime is 28057547066401. The reversal of 28057547066390 is 9366074575082.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37989956 + ... + 38721464.

It is an arithmetic number, because the mean of its divisors is an integer number (1587033621810).

Almost surely, 2^{28057547066390} is an apocalyptic number.

28057547066390 is a deficient number, since it is larger than the sum of its proper divisors (22727528831530).

28057547066390 is a wasteful number, since it uses less digits than its factorization.

28057547066390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752888.

The product of its (nonzero) digits is 76204800, while the sum is 62.

The spelling of 28057547066390 in words is "twenty-eight trillion, fifty-seven billion, five hundred forty-seven million, sixty-six thousand, three hundred ninety".