1801994150 has 48 divisors (see below), whose sum is σ = 3665055600. Its totient is φ = 653721600.

The previous prime is 1801994149. The next prime is 1801994197. The reversal of 1801994150 is 514991081.

It is a congruent number.

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, 243302 + ... + 250598.

It is an arithmetic number, because the mean of its divisors is an integer number (76355325).

Almost surely, 2^1801994150 is an apocalyptic number.

1801994150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1801994150 is an abundant number, since it is smaller than the sum of its proper divisors (1863061450).

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

1801994150 is a wasteful number, since it uses less digits than its factorization.

1801994150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7769 (or 7764 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 1801994150 is about 42449.9016488849. The cubic root of 1801994150 is about 1216.8894489979.

The spelling of 1801994150 in words is "one billion, eight hundred one million, nine hundred ninety-four thousand, one hundred fifty".