40403253 has 16 divisors (see below), whose sum is σ = 61862400. Its totient is φ = 23197680.

The previous prime is 40403243. The next prime is 40403257. The reversal of 40403253 is 35230404.

It is a happy number.

It is not a de Polignac number, because 40403253 - 2⁸ = 40402997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403257) 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, 31593 + ... + 32846.

It is an arithmetic number, because the mean of its divisors is an integer number (3866400).

Almost surely, 2^40403253 is an apocalyptic number.

It is an amenable number.

40403253 is a deficient number, since it is larger than the sum of its proper divisors (21459147).

40403253 is a wasteful number, since it uses less digits than its factorization.

40403253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64472.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 40403253 is about 6356.3553236112. The cubic root of 40403253 is about 343.1406037011.

Adding to 40403253 its reverse (35230404), we get a palindrome (75633657).

The spelling of 40403253 in words is "forty million, four hundred three thousand, two hundred fifty-three".