40136844 has 24 divisors (see below), whose sum is σ = 102166848. Its totient is φ = 12162640.

The previous prime is 40136843. The next prime is 40136849. The reversal of 40136844 is 44863104.

It is a super-2 number, since 2×40136844² = 3221932492560672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40136843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151902 + ... + 152165.

It is an arithmetic number, because the mean of its divisors is an integer number (4256952).

Almost surely, 2^40136844 is an apocalyptic number.

40136844 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40136844 is an abundant number, since it is smaller than the sum of its proper divisors (62030004).

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

40136844 is a wasteful number, since it uses less digits than its factorization.

40136844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304085 (or 304083 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 40136844 is about 6335.3645514682. The cubic root of 40136844 is about 342.3847453499.

Adding to 40136844 its reverse (44863104), we get a palindrome (84999948).

The spelling of 40136844 in words is "forty million, one hundred thirty-six thousand, eight hundred forty-four".