40406605 has 16 divisors (see below), whose sum is σ = 49916160. Its totient is φ = 31384512.

The previous prime is 40406593. The next prime is 40406629. The reversal of 40406605 is 50660404.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40406605 - 2⁵ = 40406573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40406605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32047 + ... + 33283.

It is an arithmetic number, because the mean of its divisors is an integer number (3119760).

Almost surely, 2^40406605 is an apocalyptic number.

It is an amenable number.

40406605 is a deficient number, since it is larger than the sum of its proper divisors (9509555).

40406605 is a wasteful number, since it uses less digits than its factorization.

40406605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40406605 is about 6356.6189912563. The cubic root of 40406605 is about 343.1500928339.

The spelling of 40406605 in words is "forty million, four hundred six thousand, six hundred five".