40991200 has 36 divisors (see below), whose sum is σ = 100071720. Its totient is φ = 16396160.

The previous prime is 40991183. The next prime is 40991201. The reversal of 40991200 is 219904.

40991200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40991201) 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 5 ways as a sum of consecutive naturals, for example, 24820 + ... + 26419.

It is an arithmetic number, because the mean of its divisors is an integer number (2779770).

Almost surely, 2^40991200 is an apocalyptic number.

40991200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40991200 is an abundant number, since it is smaller than the sum of its proper divisors (59080520).

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

40991200 is a wasteful number, since it uses less digits than its factorization.

40991200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51259 (or 51246 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 40991200 is about 6402.4370360043. The cubic root of 40991200 is about 344.7970521009.

The spelling of 40991200 in words is "forty million, nine hundred ninety-one thousand, two hundred".