1801874140 has 48 divisors (see below), whose sum is σ = 4133888640. Its totient is φ = 654281280.

The previous prime is 1801874131. The next prime is 1801874143. The reversal of 1801874140 is 414781081.

It is a junction number, because it is equal to n+sod(n) for n = 1801874096 and 1801874105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801874143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157039 + ... + 168121.

It is an arithmetic number, because the mean of its divisors is an integer number (86122680).

Almost surely, 2^1801874140 is an apocalyptic number.

1801874140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801874140 is an abundant number, since it is smaller than the sum of its proper divisors (2332014500).

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

1801874140 is a wasteful number, since it uses less digits than its factorization.

1801874140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842 (or 11840 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 1801874140 is about 42448.4880767266. The cubic root of 1801874140 is about 1216.8624340850.

The spelling of 1801874140 in words is "one billion, eight hundred one million, eight hundred seventy-four thousand, one hundred forty".