1801662912 has 280 divisors, whose sum is σ = 6166469760. Its totient is φ = 509483520.

The previous prime is 1801662911. The next prime is 1801662931. The reversal of 1801662912 is 2192661081.

1801662912 is a `hidden beast` number, since 1 + 8 + 0 + 16 + 629 + 12 = 666.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801662911) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4753539 + ... + 4753917.

Almost surely, 2^1801662912 is an apocalyptic number.

1801662912 is a gapful number since it is divisible by the number (12) 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 1801662912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3083234880).

1801662912 is an abundant number, since it is smaller than the sum of its proper divisors (4364806848).

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

1801662912 is a wasteful number, since it uses less digits than its factorization.

1801662912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1801662912 is about 42445.9999528813. Note that the first 4 decimals coincide. The cubic root of 1801662912 is about 1216.8148825835.

The spelling of 1801662912 in words is "one billion, eight hundred one million, six hundred sixty-two thousand, nine hundred twelve".