40406355 has 24 divisors (see below), whose sum is σ = 76405680. Its totient is φ = 19590720.

The previous prime is 40406329. The next prime is 40406381. The reversal of 40406355 is 55360404.

It is an interprime number because it is at equal distance from previous prime (40406329) and next prime (40406381).

It is not a de Polignac number, because 40406355 - 2⁹ = 40405843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40320 + ... + 41309.

It is an arithmetic number, because the mean of its divisors is an integer number (3183570).

Almost surely, 2^40406355 is an apocalyptic number.

40406355 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40406355 is a deficient number, since it is larger than the sum of its proper divisors (35999325).

40406355 is a wasteful number, since it uses less digits than its factorization.

40406355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81651 (or 81648 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40406355 is about 6356.5993266840. The cubic root of 40406355 is about 343.1493851303.

Adding to 40406355 its reverse (55360404), we get a palindrome (95766759).

The spelling of 40406355 in words is "forty million, four hundred six thousand, three hundred fifty-five".