40236840 has 144 divisors (see below), whose sum is σ = 152186580. Its totient is φ = 9192960.

The previous prime is 40236839. The next prime is 40236877. The reversal of 40236840 is 4863204.

It can be written as a sum of positive squares in 2 ways, for example, as 40220964 + 15876 = 6342^2 + 126^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16500 + ... + 18780.

Almost surely, 2^40236840 is an apocalyptic number.

40236840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40236840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76093290).

40236840 is an abundant number, since it is smaller than the sum of its proper divisors (111949740).

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

40236840 is a wasteful number, since it uses less digits than its factorization.

40236840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40236840 is about 6343.2515321403. The cubic root of 40236840 is about 342.6688460112.

The spelling of 40236840 in words is "forty million, two hundred thirty-six thousand, eight hundred forty".