40508556 has 24 divisors (see below), whose sum is σ = 103113024. Its totient is φ = 12275280.

The previous prime is 40508539. The next prime is 40508557. The reversal of 40508556 is 65580504.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (40508557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153310 + ... + 153573.

It is an arithmetic number, because the mean of its divisors is an integer number (4296376).

Almost surely, 2^40508556 is an apocalyptic number.

It is an amenable number.

40508556 is an abundant number, since it is smaller than the sum of its proper divisors (62604468).

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

40508556 is a wasteful number, since it uses less digits than its factorization.

40508556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306901 (or 306899 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 40508556 is about 6364.6332180260. The cubic root of 40508556 is about 343.4384542115.

The spelling of 40508556 in words is "forty million, five hundred eight thousand, five hundred fifty-six".