40199680 has 80 divisors (see below), whose sum is σ = 98993664. Its totient is φ = 15646720.

The previous prime is 40199651. The next prime is 40199689. The reversal of 40199680 is 8699104.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40199689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104769 + ... + 105151.

Almost surely, 2^40199680 is an apocalyptic number.

40199680 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 40199680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49496832).

40199680 is an abundant number, since it is smaller than the sum of its proper divisors (58793984).

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

40199680 is an equidigital number, since it uses as much as digits as its factorization.

40199680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 40199680 is about 6340.3217583968. The cubic root of 40199680 is about 342.5633249988.

The spelling of 40199680 in words is "forty million, one hundred ninety-nine thousand, six hundred eighty".