40408605 has 32 divisors (see below), whose sum is σ = 73518720. Its totient is φ = 21047040.

The previous prime is 40408591. The next prime is 40408607. The reversal of 40408605 is 50680404.

It is not a de Polignac number, because 40408605 - 2¹³ = 40400413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2325 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (2297460).

Almost surely, 2^40408605 is an apocalyptic number.

40408605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40408605 is a deficient number, since it is larger than the sum of its proper divisors (33110115).

40408605 is a wasteful number, since it uses less digits than its factorization.

40408605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018 (or 7012 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40408605 is about 6356.7763056442. The cubic root of 40408605 is about 343.1557543577.

The spelling of 40408605 in words is "forty million, four hundred eight thousand, six hundred five".