1940201856 has 128 divisors (see below), whose sum is σ = 5881442400. Its totient is φ = 629213184.

The previous prime is 1940201849. The next prime is 1940201909. The reversal of 1940201856 is 6581020491.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1940201856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120286 + ... + 135458.

Almost surely, 2^1940201856 is an apocalyptic number.

1940201856 is a gapful number since it is divisible by the number (16) 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 1940201856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2940721200).

1940201856 is an abundant number, since it is smaller than the sum of its proper divisors (3941240544).

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

1940201856 is a wasteful number, since it uses less digits than its factorization.

1940201856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15233 (or 15215 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1940201856 is about 44047.7224836881. The cubic root of 1940201856 is about 1247.2369595996.

The spelling of 1940201856 in words is "one billion, nine hundred forty million, two hundred one thousand, eight hundred fifty-six".