40636242 has 20 divisors (see below), whose sum is σ = 91055646. Its totient is φ = 13545360.

The previous prime is 40636229. The next prime is 40636259. The reversal of 40636242 is 24263604.

40636242 is a `hidden beast` number, since 4 + 0 + 636 + 24 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 17969121 = 4761^2 + 4239^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125259 + ... + 125582.

Almost surely, 2^40636242 is an apocalyptic number.

40636242 is an abundant number, since it is smaller than the sum of its proper divisors (50419404).

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

40636242 is a wasteful number, since it uses less digits than its factorization.

40636242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250855 (or 250846 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 40636242 is about 6374.6562260251. The cubic root of 40636242 is about 343.7989236372.

Adding to 40636242 its reverse (24263604), we get a palindrome (64899846).

The spelling of 40636242 in words is "forty million, six hundred thirty-six thousand, two hundred forty-two".