40072989 has 8 divisors (see below), whose sum is σ = 58288032. Its totient is φ = 24286640.

The previous prime is 40072979. The next prime is 40072993. The reversal of 40072989 is 98927004.

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 40072989 - 2⁴ = 40072973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072979) 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, 607134 + ... + 607199.

It is an arithmetic number, because the mean of its divisors is an integer number (7286004).

Almost surely, 2^40072989 is an apocalyptic number.

It is an amenable number.

40072989 is a deficient number, since it is larger than the sum of its proper divisors (18215043).

40072989 is a wasteful number, since it uses less digits than its factorization.

40072989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214347.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 40072989 is about 6330.3229775423. The cubic root of 40072989 is about 342.2030786636.

It can be divided in two parts, 4007 and 2989, that added together give a palindrome (6996).

The spelling of 40072989 in words is "forty million, seventy-two thousand, nine hundred eighty-nine".