1901872 has 20 divisors (see below), whose sum is σ = 4211536. Its totient is φ = 815040.

The previous prime is 1901857. The next prime is 1901891. The reversal of 1901872 is 2781091.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1901872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8379 + ... + 8602.

2^1901872 is an apocalyptic number.

It is an amenable number.

1901872 is an abundant number, since it is smaller than the sum of its proper divisors (2309664).

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

1901872 is a wasteful number, since it uses less digits than its factorization.

1901872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16996 (or 16990 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1901872 is about 1379.0837538018. The cubic root of 1901872 is about 123.8968966055.

The spelling of 1901872 in words is "one million, nine hundred one thousand, eight hundred seventy-two".