1990941750 has 192 divisors, whose sum is σ = 6230794752. Its totient is φ = 449294400.

The previous prime is 1990941749. The next prime is 1990941763. The reversal of 1990941750 is 571490991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1990941696 and 1990941705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1306489 + ... + 1308011.

It is an arithmetic number, because the mean of its divisors is an integer number (32452056).

Almost surely, 2^1990941750 is an apocalyptic number.

1990941750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990941750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3115397376).

1990941750 is an abundant number, since it is smaller than the sum of its proper divisors (4239853002).

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

1990941750 is a wasteful number, since it uses less digits than its factorization.

1990941750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 1990941750 is about 44619.9703047862. The cubic root of 1990941750 is about 1258.0160577027.

The spelling of 1990941750 in words is "one billion, nine hundred ninety million, nine hundred forty-one thousand, seven hundred fifty".