40005744 has 20 divisors (see below), whose sum is σ = 103348296. Its totient is φ = 13335232.

The previous prime is 40005739. The next prime is 40005803. The reversal of 40005744 is 44750004.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416679 + ... + 416774.

Almost surely, 2^40005744 is an apocalyptic number.

It is an amenable number.

40005744 is an abundant number, since it is smaller than the sum of its proper divisors (63342552).

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

40005744 is a wasteful number, since it uses less digits than its factorization.

40005744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833464 (or 833458 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 40005744 is about 6325.0094071076. The cubic root of 40005744 is about 342.0115587215.

Adding to 40005744 its reverse (44750004), we get a palindrome (84755748).

The spelling of 40005744 in words is "forty million, five thousand, seven hundred forty-four".