40144709 has 8 divisors (see below), whose sum is σ = 44086080. Its totient is φ = 36252000.

The previous prime is 40144703. The next prime is 40144717. The reversal of 40144709 is 90744104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40144709 - 2¹⁶ = 40079173 is a prime.

It is a super-2 number, since 2×40144709² = 3223195321389362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10424 + ... + 13745.

It is an arithmetic number, because the mean of its divisors is an integer number (5510760).

Almost surely, 2^40144709 is an apocalyptic number.

It is an amenable number.

40144709 is a deficient number, since it is larger than the sum of its proper divisors (3941371).

40144709 is a wasteful number, since it uses less digits than its factorization.

40144709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24331.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40144709 is about 6335.9852430384. The cubic root of 40144709 is about 342.4071078468.

The spelling of 40144709 in words is "forty million, one hundred forty-four thousand, seven hundred nine".