40426217 has 4 divisors (see below), whose sum is σ = 43535940. Its totient is φ = 37316496.

The previous prime is 40426213. The next prime is 40426219. The reversal of 40426217 is 71262404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9634816 + 30791401 = 3104^2 + 5549^2 .

It is a cyclic number.

It is not a de Polignac number, because 40426217 - 2² = 40426213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40426213) 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, 1554842 + ... + 1554867.

It is an arithmetic number, because the mean of its divisors is an integer number (10883985).

Almost surely, 2^40426217 is an apocalyptic number.

It is an amenable number.

40426217 is a deficient number, since it is larger than the sum of its proper divisors (3109723).

40426217 is a wasteful number, since it uses less digits than its factorization.

40426217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109722.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40426217 is about 6358.1614480917. The cubic root of 40426217 is about 343.2056016721.

The spelling of 40426217 in words is "forty million, four hundred twenty-six thousand, two hundred seventeen".