40404245 has 16 divisors (see below), whose sum is σ = 55531008. Its totient is φ = 27646080.

The previous prime is 40404239. The next prime is 40404269. The reversal of 40404245 is 54240404.

It is not a de Polignac number, because 40404245 - 2¹² = 40400149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40404245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20660 + ... + 22530.

It is an arithmetic number, because the mean of its divisors is an integer number (3470688).

Almost surely, 2^40404245 is an apocalyptic number.

It is an amenable number.

40404245 is a deficient number, since it is larger than the sum of its proper divisors (15126763).

40404245 is a wasteful number, since it uses less digits than its factorization.

40404245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 40404245 is about 6356.4333552709. The cubic root of 40404245 is about 343.1434119956.

Adding to 40404245 its reverse (54240404), we get a palindrome (94644649).

The spelling of 40404245 in words is "forty million, four hundred four thousand, two hundred forty-five".