40400433 has 6 divisors (see below), whose sum is σ = 58356194. Its totient is φ = 26933616.

The previous prime is 40400431. The next prime is 40400453. The reversal of 40400433 is 33400404.

It can be written as a sum of positive squares in only one way, i.e., 36759969 + 3640464 = 6063^2 + 1908^2 .

It is not a de Polignac number, because 40400433 - 2¹ = 40400431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40400431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2244460 + ... + 2244477.

Almost surely, 2^40400433 is an apocalyptic number.

It is an amenable number.

40400433 is a deficient number, since it is larger than the sum of its proper divisors (17955761).

40400433 is a wasteful number, since it uses less digits than its factorization.

40400433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488943 (or 4488940 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40400433 is about 6356.1334945075. The cubic root of 40400433 is about 343.1326201937.

Adding to 40400433 its reverse (33400404), we get a palindrome (73800837).

The spelling of 40400433 in words is "forty million, four hundred thousand, four hundred thirty-three".