40031889 has 8 divisors (see below), whose sum is σ = 56515680. Its totient is φ = 25118016.

The previous prime is 40031869. The next prime is 40031899. The reversal of 40031889 is 98813004.

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

It is not a de Polignac number, because 40031889 - 2¹¹ = 40029841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40031869) 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, 392419 + ... + 392520.

It is an arithmetic number, because the mean of its divisors is an integer number (7064460).

Almost surely, 2^40031889 is an apocalyptic number.

It is an amenable number.

40031889 is a deficient number, since it is larger than the sum of its proper divisors (16483791).

40031889 is a wasteful number, since it uses less digits than its factorization.

40031889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784959.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40031889 is about 6327.0758648842. The cubic root of 40031889 is about 342.0860475664.

The spelling of 40031889 in words is "forty million, thirty-one thousand, eight hundred eighty-nine".