40899768 has 128 divisors (see below), whose sum is σ = 128325120. Its totient is φ = 10575360.

The previous prime is 40899701. The next prime is 40899769. The reversal of 40899768 is 86799804.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40899768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40899769) 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, 133071 + ... + 133377.

It is an arithmetic number, because the mean of its divisors is an integer number (1002540).

Almost surely, 2^40899768 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 40899768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64162560).

40899768 is an abundant number, since it is smaller than the sum of its proper divisors (87425352).

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

40899768 is a wasteful number, since it uses less digits than its factorization.

40899768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 40899768 is about 6395.2926438123. The cubic root of 40899768 is about 344.5405014864.

The spelling of 40899768 in words is "forty million, eight hundred ninety-nine thousand, seven hundred sixty-eight".