40644200 has 24 divisors (see below), whose sum is σ = 94498230. Its totient is φ = 16257600.

The previous prime is 40644199. The next prime is 40644223. The reversal of 40644200 is 244604.

It can be written as a sum of positive squares in 3 ways, for example, as 20376196 + 20268004 = 4514^2 + 4502^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101411 + ... + 101810.

Almost surely, 2^40644200 is an apocalyptic number.

40644200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40644200 is an abundant number, since it is smaller than the sum of its proper divisors (53854030).

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

40644200 is a wasteful number, since it uses less digits than its factorization.

40644200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203237 (or 203228 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40644200 is about 6375.2803859909. The cubic root of 40644200 is about 343.8213647975.

Adding to 40644200 its reverse (244604), we get a palindrome (40888804).

The spelling of 40644200 in words is "forty million, six hundred forty-four thousand, two hundred".