1985517028 has 12 divisors (see below), whose sum is σ = 3790532592. Its totient is φ = 902507720.

The previous prime is 1985517013. The next prime is 1985517041. The reversal of 1985517028 is 8207155891.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22562650 + ... + 22562737.

It is an arithmetic number, because the mean of its divisors is an integer number (315877716).

Almost surely, 2^1985517028 is an apocalyptic number.

It is an amenable number.

1985517028 is a deficient number, since it is larger than the sum of its proper divisors (1805015564).

1985517028 is a wasteful number, since it uses less digits than its factorization.

1985517028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45125402 (or 45125400 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 46.

The square root of 1985517028 is about 44559.1407906391. The cubic root of 1985517028 is about 1256.8724456536.

The spelling of 1985517028 in words is "one billion, nine hundred eighty-five million, five hundred seventeen thousand, twenty-eight".