40199842 has 8 divisors (see below), whose sum is σ = 60493356. Its totient is φ = 20035392.

The previous prime is 40199821. The next prime is 40199843. The reversal of 40199842 is 24899104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31911201 + 8288641 = 5649^2 + 2879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40199843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31483 + ... + 32734.

Almost surely, 2^40199842 is an apocalyptic number.

40199842 is a deficient number, since it is larger than the sum of its proper divisors (20293514).

40199842 is a wasteful number, since it uses less digits than its factorization.

40199842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64532.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 40199842 is about 6340.3345337608. The cubic root of 40199842 is about 342.5637851615.

It can be divided in two parts, 40199 and 842, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 40199842 in words is "forty million, one hundred ninety-nine thousand, eight hundred forty-two".