40290403 has 4 divisors (see below), whose sum is σ = 40309768. Its totient is φ = 40271040.

The previous prime is 40290377. The next prime is 40290409. The reversal of 40290403 is 30409204.

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

It is a cyclic number.

It is not a de Polignac number, because 40290403 - 2⁹ = 40289891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40290409) 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, 6126 + ... + 10867.

It is an arithmetic number, because the mean of its divisors is an integer number (10077442).

Almost surely, 2^40290403 is an apocalyptic number.

40290403 is a deficient number, since it is larger than the sum of its proper divisors (19365).

40290403 is a wasteful number, since it uses less digits than its factorization.

40290403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19364.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40290403 is about 6347.4721740233. The cubic root of 40290403 is about 342.8208313810.

Adding to 40290403 its reverse (30409204), we get a palindrome (70699607).

The spelling of 40290403 in words is "forty million, two hundred ninety thousand, four hundred three".