40685736 has 96 divisors (see below), whose sum is σ = 125962560. Its totient is φ = 10722816.

The previous prime is 40685731. The next prime is 40685737. The reversal of 40685736 is 63758604.

It is a super-2 number, since 2×40685736² = 3310658227723392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 40685694 and 40685703.

It is not an unprimeable number, because it can be changed into a prime (40685731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27676 + ... + 29108.

It is an arithmetic number, because the mean of its divisors is an integer number (1312110).

Almost surely, 2^40685736 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 40685736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62981280).

40685736 is an abundant number, since it is smaller than the sum of its proper divisors (85276824).

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

40685736 is a wasteful number, since it uses less digits than its factorization.

40685736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 40685736 is about 6378.5371363660. The cubic root of 40685736 is about 343.9384467116.

The spelling of 40685736 in words is "forty million, six hundred eighty-five thousand, seven hundred thirty-six".