40226391 has 6 divisors (see below), whose sum is σ = 58104800. Its totient is φ = 26817588.

The previous prime is 40226353. The next prime is 40226413. The reversal of 40226391 is 19362204.

40226391 is a `hidden beast` number, since 4 + 0 + 22 + 639 + 1 = 666.

It is not a de Polignac number, because 40226391 - 2⁶ = 40226327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40226321) 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, 2234791 + ... + 2234808.

Almost surely, 2^40226391 is an apocalyptic number.

40226391 is a deficient number, since it is larger than the sum of its proper divisors (17878409).

40226391 is a wasteful number, since it uses less digits than its factorization.

40226391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469605 (or 4469602 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 40226391 is about 6342.4278474414. The cubic root of 40226391 is about 342.6391811837.

Adding to 40226391 its reverse (19362204), we get a palindrome (59588595).

The spelling of 40226391 in words is "forty million, two hundred twenty-six thousand, three hundred ninety-one".