40191444 has 48 divisors (see below), whose sum is σ = 104543040. Its totient is φ = 13353120.

The previous prime is 40191443. The next prime is 40191457. The reversal of 40191444 is 44419104.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40191443) 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, 60474 + ... + 61134.

It is an arithmetic number, because the mean of its divisors is an integer number (2177980).

Almost surely, 2^40191444 is an apocalyptic number.

It is an amenable number.

40191444 is an abundant number, since it is smaller than the sum of its proper divisors (64351596).

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

40191444 is a wasteful number, since it uses less digits than its factorization.

40191444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 40191444 is about 6339.6722312751. The cubic root of 40191444 is about 342.5399289233.

The spelling of 40191444 in words is "forty million, one hundred ninety-one thousand, four hundred forty-four".