1999940160 has 224 divisors, whose sum is σ = 6754855680. Its totient is φ = 500211712.

The previous prime is 1999940153. The next prime is 1999940167. The reversal of 1999940160 is 610499991.

1999940160 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1999940153) and next prime (1999940167).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1999940167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1169386 + ... + 1171094.

Almost surely, 2^1999940160 is an apocalyptic number.

1999940160 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 1999940160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3377427840).

1999940160 is an abundant number, since it is smaller than the sum of its proper divisors (4754915520).

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

1999940160 is a wasteful number, since it uses less digits than its factorization.

1999940160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 1999940160 is about 44720.6905134525. The cubic root of 1999940160 is about 1259.9084841569.

The spelling of 1999940160 in words is "one billion, nine hundred ninety-nine million, nine hundred forty thousand, one hundred sixty".