1801926 has 60 divisors (see below), whose sum is σ = 4717548. Its totient is φ = 512568.

The previous prime is 1801913. The next prime is 1801927. The reversal of 1801926 is 6291081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1801926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801927) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 7825 + ... + 8051.

2^1801926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1801926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358774).

1801926 is an abundant number, since it is smaller than the sum of its proper divisors (2915622).

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

1801926 is a wasteful number, since it uses less digits than its factorization.

1801926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1801926 is about 1342.3583724177. The cubic root of 1801926 is about 121.6874108204.

The spelling of 1801926 in words is "one million, eight hundred one thousand, nine hundred twenty-six".