1985057056 has 12 divisors (see below), whose sum is σ = 3908081142. Its totient is φ = 992528512.

The previous prime is 1985057029. The next prime is 1985057083. The reversal of 1985057056 is 6507505891.

It is an interprime number because it is at equal distance from previous prime (1985057029) and next prime (1985057083).

It can be written as a sum of positive squares in only one way, i.e., 1983811600 + 1245456 = 44540^2 + 1116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1985056997 and 1985057015.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31016485 + ... + 31016548.

Almost surely, 2^1985057056 is an apocalyptic number.

1985057056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1985057056 is a deficient number, since it is larger than the sum of its proper divisors (1923024086).

1985057056 is an equidigital number, since it uses as much as digits as its factorization.

1985057056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62033043 (or 62033035 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 46.

The square root of 1985057056 is about 44553.9791264484. The cubic root of 1985057056 is about 1256.7753809640.

The spelling of 1985057056 in words is "one billion, nine hundred eighty-five million, fifty-seven thousand, fifty-six".