40124989 has 4 divisors (see below), whose sum is σ = 40514656. Its totient is φ = 39735324.

The previous prime is 40124963. The next prime is 40125023. The reversal of 40124989 is 98942104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40124989 - 2⁵ = 40124957 is a prime.

It is a super-2 number, since 2×40124989² = 3220029484500242, 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 (40124389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194679 + ... + 194884.

It is an arithmetic number, because the mean of its divisors is an integer number (10128664).

Almost surely, 2^40124989 is an apocalyptic number.

It is an amenable number.

40124989 is a deficient number, since it is larger than the sum of its proper divisors (389667).

40124989 is a wasteful number, since it uses less digits than its factorization.

40124989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389666.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 40124989 is about 6334.4288613892. The cubic root of 40124989 is about 342.3510325942.

The spelling of 40124989 in words is "forty million, one hundred twenty-four thousand, nine hundred eighty-nine".