40555238 has 4 divisors (see below), whose sum is σ = 60832860. Its totient is φ = 20277618.

The previous prime is 40555231. The next prime is 40555241. The reversal of 40555238 is 83255504.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40555231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138808 + ... + 10138811.

It is an arithmetic number, because the mean of its divisors is an integer number (15208215).

Almost surely, 2^40555238 is an apocalyptic number.

40555238 is a deficient number, since it is larger than the sum of its proper divisors (20277622).

40555238 is a wasteful number, since it uses less digits than its factorization.

40555238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20277621.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 40555238 is about 6368.2994590393. The cubic root of 40555238 is about 343.5703295557.

The spelling of 40555238 in words is "forty million, five hundred fifty-five thousand, two hundred thirty-eight".