1901940 has 24 divisors (see below), whose sum is σ = 5325600. Its totient is φ = 507168.

The previous prime is 1901923. The next prime is 1901947. The reversal of 1901940 is 491091.

It is a self number, because there is not a number n which added to its sum of digits gives 1901940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15790 + ... + 15909.

It is an arithmetic number, because the mean of its divisors is an integer number (221900).

2^1901940 is an apocalyptic number.

1901940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901940 is an abundant number, since it is smaller than the sum of its proper divisors (3423660).

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

1901940 is a wasteful number, since it uses less digits than its factorization.

1901940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31711 (or 31709 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1901940 is about 1379.1084076315. The cubic root of 1901940 is about 123.8983732013.

The spelling of 1901940 in words is "one million, nine hundred one thousand, nine hundred forty".