40287156 has 96 divisors (see below), whose sum is σ = 117411840. Its totient is φ = 10468224.

The previous prime is 40287151. The next prime is 40287187. The reversal of 40287156 is 65178204.

It is a super-4 number, since 4×40287156⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40287151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86035 + ... + 86501.

It is an arithmetic number, because the mean of its divisors is an integer number (1223040).

Almost surely, 2^40287156 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 40287156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58705920).

40287156 is an abundant number, since it is smaller than the sum of its proper divisors (77124684).

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

40287156 is a wasteful number, since it uses less digits than its factorization.

40287156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 40287156 is about 6347.2163977605. The cubic root of 40287156 is about 342.8116218334.

The spelling of 40287156 in words is "forty million, two hundred eighty-seven thousand, one hundred fifty-six".