40180398 has 16 divisors (see below), whose sum is σ = 80452560. Its totient is φ = 13378176.

The previous prime is 40180397. The next prime is 40180429. The reversal of 40180398 is 89308104.

40180398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40180398² = 3228928766876808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40180397) 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 7 ways as a sum of consecutive naturals, for example, 2736 + ... + 9372.

It is an arithmetic number, because the mean of its divisors is an integer number (5028285).

Almost surely, 2^40180398 is an apocalyptic number.

40180398 is an abundant number, since it is smaller than the sum of its proper divisors (40272162).

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

40180398 is a wasteful number, since it uses less digits than its factorization.

40180398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40180398 is about 6338.8009907237. The cubic root of 40180398 is about 342.5085454383.

The spelling of 40180398 in words is "forty million, one hundred eighty thousand, three hundred ninety-eight".