40387236 has 36 divisors (see below), whose sum is σ = 99468432. Its totient is φ = 12752496.

The previous prime is 40387231. The next prime is 40387247. The reversal of 40387236 is 63278304.

It is a super-2 number, since 2×40387236² = 3262257663439392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40387197 and 40387206.

It is not an unprimeable number, because it can be changed into a prime (40387231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (2763012).

Almost surely, 2^40387236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40387236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49734216).

40387236 is an abundant number, since it is smaller than the sum of its proper divisors (59081196).

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

40387236 is a wasteful number, since it uses less digits than its factorization.

40387236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9368 (or 9347 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 40387236 is about 6355.0952785934. The cubic root of 40387236 is about 343.0952541392.

The spelling of 40387236 in words is "forty million, three hundred eighty-seven thousand, two hundred thirty-six".