40406351 has 4 divisors (see below), whose sum is σ = 40421304. Its totient is φ = 40391400.

The previous prime is 40406329. The next prime is 40406381. The reversal of 40406351 is 15360404.

It is a happy number.

40406351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40406351 is a prime.

It is a super-2 number, since 2×40406351² = 3265346402270402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165 + ... + 9246.

It is an arithmetic number, because the mean of its divisors is an integer number (10105326).

Almost surely, 2^40406351 is an apocalyptic number.

40406351 is a deficient number, since it is larger than the sum of its proper divisors (14953).

40406351 is a wasteful number, since it uses less digits than its factorization.

40406351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40406351 is about 6356.5990120504. The cubic root of 40406351 is about 343.1493738070.

Adding to 40406351 its reverse (15360404), we get a palindrome (55766755).

The spelling of 40406351 in words is "forty million, four hundred six thousand, three hundred fifty-one".