40889865940 has 144 divisors (see below), whose sum is σ = 109199954304. Its totient is φ = 12717868800.

The previous prime is 40889865937. The next prime is 40889865941. The reversal of 40889865940 is 4956898804.

40889865940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40889865940² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40889865941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5418570 + ... + 5426110.

It is an arithmetic number, because the mean of its divisors is an integer number (758333016).

Almost surely, 2^40889865940 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 40889865940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54599977152).

40889865940 is an abundant number, since it is smaller than the sum of its proper divisors (68310088364).

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

40889865940 is a wasteful number, since it uses less digits than its factorization.

40889865940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078 (or 8069 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 40889865940 in words is "forty billion, eight hundred eighty-nine million, eight hundred sixty-five thousand, nine hundred forty".