40245289 has 16 divisors (see below), whose sum is σ = 47037312. Its totient is φ = 33723648.

The previous prime is 40245281. The next prime is 40245311. The reversal of 40245289 is 98254204.

It is not a de Polignac number, because 40245289 - 2³ = 40245281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40245281) 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, 65347 + ... + 65959.

It is an arithmetic number, because the mean of its divisors is an integer number (2939832).

Almost surely, 2^40245289 is an apocalyptic number.

It is an amenable number.

40245289 is a deficient number, since it is larger than the sum of its proper divisors (6792023).

40245289 is a wasteful number, since it uses less digits than its factorization.

40245289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 40245289 is about 6343.9174805478. The cubic root of 40245289 is about 342.6928290614.

The spelling of 40245289 in words is "forty million, two hundred forty-five thousand, two hundred eighty-nine".