40089955 has 4 divisors (see below), whose sum is σ = 48107952. Its totient is φ = 32071960.

The previous prime is 40089953. The next prime is 40089991. The reversal of 40089955 is 55998004.

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

It is not a de Polignac number, because 40089955 - 2¹ = 40089953 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40089953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4008991 + ... + 4009000.

It is an arithmetic number, because the mean of its divisors is an integer number (12026988).

Almost surely, 2^40089955 is an apocalyptic number.

40089955 is a deficient number, since it is larger than the sum of its proper divisors (8017997).

40089955 is an equidigital number, since it uses as much as digits as its factorization.

40089955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8017996.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 40089955 is about 6331.6628937428. The cubic root of 40089955 is about 342.2513655389.

The spelling of 40089955 in words is "forty million, eighty-nine thousand, nine hundred fifty-five".