1999031040 has 216 divisors, whose sum is σ = 7281259440. Its totient is φ = 504963072.

The previous prime is 1999031033. The next prime is 1999031093. The reversal of 1999031040 is 401309991.

It is a super-2 number, since 2×1999031040² = 7992250197766963200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1999030986 and 1999031004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214314 + ... + 223446.

Almost surely, 2^1999031040 is an apocalyptic number.

1999031040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3640629720).

1999031040 is an abundant number, since it is smaller than the sum of its proper divisors (5282228400).

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

1999031040 is a wasteful number, since it uses less digits than its factorization.

1999031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179 (or 9162 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1999031040 is about 44710.5249354109. The cubic root of 1999031040 is about 1259.7175481771.

The spelling of 1999031040 in words is "one billion, nine hundred ninety-nine million, thirty-one thousand, forty".