40642002 has 24 divisors (see below), whose sum is σ = 93238236. Its totient is φ = 12750336.

The previous prime is 40642001. The next prime is 40642003. The reversal of 40642002 is 20024604.

It is an interprime number because it is at equal distance from previous prime (40642001) and next prime (40642003).

It can be written as a sum of positive squares in 2 ways, for example, as 40564161 + 77841 = 6369^2 + 279^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40642001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66103 + ... + 66714.

Almost surely, 2^40642002 is an apocalyptic number.

40642002 is an abundant number, since it is smaller than the sum of its proper divisors (52596234).

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

40642002 is a wasteful number, since it uses less digits than its factorization.

40642002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132842 (or 132839 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40642002 is about 6375.1079990852. The cubic root of 40642002 is about 343.8151668407.

Adding to 40642002 its reverse (20024604), we get a palindrome (60666606).

The spelling of 40642002 in words is "forty million, six hundred forty-two thousand, two".