840261444 has 48 divisors (see below), whose sum is σ = 2140803840. Its totient is φ = 254391840.

The previous prime is 840261437. The next prime is 840261449. The reversal of 840261444 is 444162048.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (840261449) 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, 190407 + ... + 194769.

It is an arithmetic number, because the mean of its divisors is an integer number (44600080).

Almost surely, 2^840261444 is an apocalyptic number.

It is an amenable number.

840261444 is an abundant number, since it is smaller than the sum of its proper divisors (1300542396).

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

840261444 is a wasteful number, since it uses less digits than its factorization.

840261444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5840 (or 5838 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 840261444 is about 28987.2634789833. The cubic root of 840261444 is about 943.6366758128.

The spelling of 840261444 in words is "eight hundred forty million, two hundred sixty-one thousand, four hundred forty-four".