40136724 has 18 divisors (see below), whose sum is σ = 101456810. Its totient is φ = 13378896.

The previous prime is 40136713. The next prime is 40136773. The reversal of 40136724 is 42763104.

It can be written as a sum of positive squares in only one way, i.e., 36216324 + 3920400 = 6018^2 + 1980^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×40136724² = 3221913226904352, which contains 22 as substring.

It is a congruent number.

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, 557419 + ... + 557490.

Almost surely, 2^40136724 is an apocalyptic number.

It is an amenable number.

40136724 is an abundant number, since it is smaller than the sum of its proper divisors (61320086).

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

40136724 is a wasteful number, since it uses less digits than its factorization.

40136724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114919 (or 1114914 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40136724 is about 6335.3550808143. The cubic root of 40136724 is about 342.3844041321.

Adding to 40136724 its reverse (42763104), we get a palindrome (82899828).

The spelling of 40136724 in words is "forty million, one hundred thirty-six thousand, seven hundred twenty-four".