40012080 has 80 divisors (see below), whose sum is σ = 124679520. Its totient is φ = 10614784.

The previous prime is 40012051. The next prime is 40012097. The reversal of 40012080 is 8021004.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 70036 + ... + 70604.

It is an arithmetic number, because the mean of its divisors is an integer number (1558494).

Almost surely, 2^40012080 is an apocalyptic number.

40012080 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 40012080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62339760).

40012080 is an abundant number, since it is smaller than the sum of its proper divisors (84667440).

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

40012080 is a wasteful number, since it uses less digits than its factorization.

40012080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 40012080 is about 6325.5102560979. The cubic root of 40012080 is about 342.0296133859.

Adding to 40012080 its reverse (8021004), we get a palindrome (48033084).

The spelling of 40012080 in words is "forty million, twelve thousand, eighty".