40991976 has 48 divisors (see below), whose sum is σ = 112284900. Its totient is φ = 13508352.

The previous prime is 40991963. The next prime is 40991983. The reversal of 40991976 is 67919904.

It can be written as a sum of positive squares in 2 ways, for example, as 31069476 + 9922500 = 5574^2 + 3150^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3210 + ... + 9606.

Almost surely, 2^40991976 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 40991976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56142450).

40991976 is an abundant number, since it is smaller than the sum of its proper divisors (71292924).

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

40991976 is a wasteful number, since it uses less digits than its factorization.

40991976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 40991976 is about 6402.4976376411. The cubic root of 40991976 is about 344.7992278592.

It can be divided in two parts, 40 and 991976, that added together give a square (992016 = 996²).

The spelling of 40991976 in words is "forty million, nine hundred ninety-one thousand, nine hundred seventy-six".