40243285 has 4 divisors (see below), whose sum is σ = 48291948. Its totient is φ = 32194624.

The previous prime is 40243283. The next prime is 40243303. The reversal of 40243285 is 58234204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9872164 + 30371121 = 3142^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 40243285 - 2¹ = 40243283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243283) 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, 4024324 + ... + 4024333.

It is an arithmetic number, because the mean of its divisors is an integer number (12072987).

Almost surely, 2^40243285 is an apocalyptic number.

It is an amenable number.

40243285 is a deficient number, since it is larger than the sum of its proper divisors (8048663).

40243285 is an equidigital number, since it uses as much as digits as its factorization.

40243285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048662.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 40243285 is about 6343.7595320125. The cubic root of 40243285 is about 342.6871408774.

Adding to 40243285 its reverse (58234204), we get a palindrome (98477489).

The spelling of 40243285 in words is "forty million, two hundred forty-three thousand, two hundred eighty-five".