40026405 has 8 divisors (see below), whose sum is σ = 64042272. Its totient is φ = 21347408.

The previous prime is 40026383. The next prime is 40026419. The reversal of 40026405 is 50462004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40026405 - 2⁷ = 40026277 is a prime.

It is a super-2 number, since 2×40026405² = 3204226194448050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334199 + ... + 1334228.

It is an arithmetic number, because the mean of its divisors is an integer number (8005284).

Almost surely, 2^40026405 is an apocalyptic number.

It is an amenable number.

40026405 is a deficient number, since it is larger than the sum of its proper divisors (24015867).

40026405 is a wasteful number, since it uses less digits than its factorization.

40026405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668435.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40026405 is about 6326.6424744883. The cubic root of 40026405 is about 342.0704259740.

Adding to 40026405 its reverse (50462004), we get a palindrome (90488409).

The spelling of 40026405 in words is "forty million, twenty-six thousand, four hundred five".