40591880 has 64 divisors (see below), whose sum is σ = 108000000. Its totient is φ = 13434624.

The previous prime is 40591877. The next prime is 40591919. The reversal of 40591880 is 8819504.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 40591880.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5621 + ... + 10619.

It is an arithmetic number, because the mean of its divisors is an integer number (1687500).

Almost surely, 2^40591880 is an apocalyptic number.

40591880 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 40591880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54000000).

40591880 is an abundant number, since it is smaller than the sum of its proper divisors (67408120).

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

40591880 is a wasteful number, since it uses less digits than its factorization.

40591880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 40591880 is about 6371.1757156745. The cubic root of 40591880 is about 343.6737713064.

The spelling of 40591880 in words is "forty million, five hundred ninety-one thousand, eight hundred eighty".