40891356 has 72 divisors (see below), whose sum is σ = 116433408. Its totient is φ = 11988000.

The previous prime is 40891351. The next prime is 40891369. The reversal of 40891356 is 65319804.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40891356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40891351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10611 + ... + 13941.

Almost surely, 2^40891356 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 40891356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58216704).

40891356 is an abundant number, since it is smaller than the sum of its proper divisors (75542052).

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

40891356 is a wasteful number, since it uses less digits than its factorization.

40891356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40891356 is about 6394.6349387592. The cubic root of 40891356 is about 344.5168789122.

It can be divided in two parts, 4089 and 1356, that added together give a palindrome (5445).

The spelling of 40891356 in words is "forty million, eight hundred ninety-one thousand, three hundred fifty-six".