40487944 has 64 divisors (see below), whose sum is σ = 90979200. Its totient is φ = 16525824.

The previous prime is 40487939. The next prime is 40487977. The reversal of 40487944 is 44978404.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40487897 and 40487906.

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, 173652 + ... + 173884.

It is an arithmetic number, because the mean of its divisors is an integer number (1421550).

Almost surely, 2^40487944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40487944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45489600).

40487944 is an abundant number, since it is smaller than the sum of its proper divisors (50491256).

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

40487944 is a wasteful number, since it uses less digits than its factorization.

40487944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 40487944 is about 6363.0137513603. The cubic root of 40487944 is about 343.3801936437.

The spelling of 40487944 in words is "forty million, four hundred eighty-seven thousand, nine hundred forty-four".