40945905 has 160 divisors (see below), whose sum is σ = 99525888. Its totient is φ = 15552000.

The previous prime is 40945903. The next prime is 40945973. The reversal of 40945905 is 50954904.

It is not a de Polignac number, because 40945905 - 2¹ = 40945903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40945905.

It is not an unprimeable number, because it can be changed into a prime (40945901) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 405355 + ... + 405455.

It is a vampire number, since it can be written as 4545 ⋅ 9009 (with its own digits).

Almost surely, 2^40945905 is an apocalyptic number.

40945905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40945905 is an abundant number, since it is smaller than the sum of its proper divisors (58579983).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40945905 is a wasteful number, since it uses less digits than its factorization.

40945905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 40945905 is about 6398.8987333759. The cubic root of 40945905 is about 344.6700058207.

It can be divided in two parts, 4094 and 5905, that added together give a palindrome (9999).

The spelling of 40945905 in words is "forty million, nine hundred forty-five thousand, nine hundred five".