40991088 has 20 divisors (see below), whose sum is σ = 105893768. Its totient is φ = 13663680.

The previous prime is 40991087. The next prime is 40991099. The reversal of 40991088 is 88019904.

40991088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40991087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426943 + ... + 427038.

Almost surely, 2^40991088 is an apocalyptic number.

40991088 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40991088 is an abundant number, since it is smaller than the sum of its proper divisors (64902680).

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

40991088 is a wasteful number, since it uses less digits than its factorization.

40991088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853992 (or 853986 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 40991088 is about 6402.4282893290. The cubic root of 40991088 is about 344.7967380717.

The spelling of 40991088 in words is "forty million, nine hundred ninety-one thousand, eighty-eight".