40501636 has 18 divisors (see below), whose sum is σ = 82450158. Its totient is φ = 17357760.

The previous prime is 40501631. The next prime is 40501649. The reversal of 40501636 is 63610504.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 17172736 = 4830^2 + 4144^2 .

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 40501636.

It is not an unprimeable number, because it can be changed into a prime (40501631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103125 + ... + 103516.

Almost surely, 2^40501636 is an apocalyptic number.

It is an amenable number.

40501636 is an abundant number, since it is smaller than the sum of its proper divisors (41948522).

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

40501636 is a wasteful number, since it uses less digits than its factorization.

40501636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206659 (or 206650 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40501636 is about 6364.0895656802. The cubic root of 40501636 is about 343.4188967840.

The spelling of 40501636 in words is "forty million, five hundred one thousand, six hundred thirty-six".