40861440 has 108 divisors (see below), whose sum is σ = 141416184. Its totient is φ = 10893312.

The previous prime is 40861433. The next prime is 40861451. The reversal of 40861440 is 4416804.

40861440 is a `hidden beast` number, since 4 + 0 + 8 + 614 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9747 + ... + 13293.

Almost surely, 2^40861440 is an apocalyptic number.

40861440 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 40861440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70708092).

40861440 is an abundant number, since it is smaller than the sum of its proper divisors (100554744).

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

40861440 is a wasteful number, since it uses less digits than its factorization.

40861440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 40861440 is about 6392.2953623874. The cubic root of 40861440 is about 344.4328425583.

The spelling of 40861440 in words is "forty million, eight hundred sixty-one thousand, four hundred forty".