40555242 has 144 divisors (see below), whose sum is σ = 115026912. Its totient is φ = 10614240.

The previous prime is 40555241. The next prime is 40555289. The reversal of 40555242 is 24255504.

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

It is not an unprimeable number, because it can be changed into a prime (40555241) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 309517 + ... + 309647.

It is an arithmetic number, because the mean of its divisors is an integer number (798798).

Almost surely, 2^40555242 is an apocalyptic number.

40555242 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40555242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57513456).

40555242 is an abundant number, since it is smaller than the sum of its proper divisors (74471670).

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

40555242 is a wasteful number, since it uses less digits than its factorization.

40555242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 40555242 is about 6368.2997730949. The cubic root of 40555242 is about 343.5703408512.

The spelling of 40555242 in words is "forty million, five hundred fifty-five thousand, two hundred forty-two".