40543998 has 32 divisors (see below), whose sum is σ = 90623232. Its totient is φ = 11985600.

The previous prime is 40543991. The next prime is 40543999. The reversal of 40543998 is 89934504.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40543991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4786 + ... + 10197.

It is an arithmetic number, because the mean of its divisors is an integer number (2831976).

Almost surely, 2^40543998 is an apocalyptic number.

40543998 is an abundant number, since it is smaller than the sum of its proper divisors (50079234).

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

40543998 is a wasteful number, since it uses less digits than its factorization.

40543998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15040.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 40543998 is about 6367.4169016957. The cubic root of 40543998 is about 343.5385861236.

The spelling of 40543998 in words is "forty million, five hundred forty-three thousand, nine hundred ninety-eight".