40240389 has 16 divisors (see below), whose sum is σ = 62746112. Its totient is φ = 22459248.

The previous prime is 40240381. The next prime is 40240391. The reversal of 40240389 is 98304204.

It is a happy number.

It is not a de Polignac number, because 40240389 - 2³ = 40240381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40240381) 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, 21379 + ... + 23184.

It is an arithmetic number, because the mean of its divisors is an integer number (3921632).

Almost surely, 2^40240389 is an apocalyptic number.

It is an amenable number.

40240389 is a deficient number, since it is larger than the sum of its proper divisors (22505723).

40240389 is a wasteful number, since it uses less digits than its factorization.

40240389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44616.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40240389 is about 6343.5312720913. The cubic root of 40240389 is about 342.6789204934.

The spelling of 40240389 in words is "forty million, two hundred forty thousand, three hundred eighty-nine".