1999056 has 20 divisors (see below), whose sum is σ = 5164352. Its totient is φ = 666336.

The previous prime is 1999043. The next prime is 1999061. The reversal of 1999056 is 6509991.

It is a super-2 number, since 2×1999056² = 7992449782272, which 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 3 ways as a sum of consecutive naturals, for example, 20776 + ... + 20871.

2^1999056 is an apocalyptic number.

1999056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1999056 is an abundant number, since it is smaller than the sum of its proper divisors (3165296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999056 is a wasteful number, since it uses less digits than its factorization.

1999056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41658 (or 41652 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 1999056 is about 1413.8797685801. The cubic root of 1999056 is about 125.9722791120.

The spelling of 1999056 in words is "one million, nine hundred ninety-nine thousand, fifty-six".