40556002 has 4 divisors (see below), whose sum is σ = 60834006. Its totient is φ = 20278000.

The previous prime is 40555987. The next prime is 40556003. The reversal of 40556002 is 20065504.

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

It can be written as a sum of positive squares in only one way, i.e., 30702681 + 9853321 = 5541^2 + 3139^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40556003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138999 + ... + 10139002.

Almost surely, 2^40556002 is an apocalyptic number.

40556002 is a deficient number, since it is larger than the sum of its proper divisors (20278004).

40556002 is a wasteful number, since it uses less digits than its factorization.

40556002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20278003.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40556002 is about 6368.3594433732. The cubic root of 40556002 is about 343.5724869924.

The spelling of 40556002 in words is "forty million, five hundred fifty-six thousand, two".