40099998 has 16 divisors (see below), whose sum is σ = 80712720. Its totient is φ = 13281216.

The previous prime is 40099987. The next prime is 40100003. The reversal of 40099998 is 89999004.

It is a happy number.

40099998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20343 + ... + 22226.

It is an arithmetic number, because the mean of its divisors is an integer number (5044545).

Almost surely, 2^40099998 is an apocalyptic number.

40099998 is an abundant number, since it is smaller than the sum of its proper divisors (40612722).

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

40099998 is a wasteful number, since it uses less digits than its factorization.

40099998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42731.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 40099998 is about 6332.4559216784. The cubic root of 40099998 is about 342.2799424687.

The spelling of 40099998 in words is "forty million, ninety-nine thousand, nine hundred ninety-eight".