40245789 has 8 divisors (see below), whose sum is σ = 53745120. Its totient is φ = 26788496.

The previous prime is 40245769. The next prime is 40245827. The reversal of 40245789 is 98754204.

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 40245789 - 2⁵ = 40245757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40245739) 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, 8202 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (6718140).

Almost surely, 2^40245789 is an apocalyptic number.

It is an amenable number.

40245789 is a deficient number, since it is larger than the sum of its proper divisors (13499331).

40245789 is a wasteful number, since it uses less digits than its factorization.

40245789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 40245789 is about 6343.9568882520. The cubic root of 40245789 is about 342.6942482395.

The spelling of 40245789 in words is "forty million, two hundred forty-five thousand, seven hundred eighty-nine".