40023289 has 4 divisors (see below), whose sum is σ = 41763456. Its totient is φ = 38283124.

The previous prime is 40023229. The next prime is 40023311. The reversal of 40023289 is 98232004.

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 40023289 - 2¹⁵ = 39990521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40023209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870049 + ... + 870094.

It is an arithmetic number, because the mean of its divisors is an integer number (10440864).

Almost surely, 2^40023289 is an apocalyptic number.

It is an amenable number.

40023289 is a deficient number, since it is larger than the sum of its proper divisors (1740167).

40023289 is a wasteful number, since it uses less digits than its factorization.

40023289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740166.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40023289 is about 6326.3962095335. The cubic root of 40023289 is about 342.0615491746.

The spelling of 40023289 in words is "forty million, twenty-three thousand, two hundred eighty-nine".