40197898 has 8 divisors (see below), whose sum is σ = 64935108. Its totient is φ = 18552864.

The previous prime is 40197889. The next prime is 40197907. The reversal of 40197898 is 89879104.

It is a happy number.

40197898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40197889) and next prime (40197907).

It can be written as a sum of positive squares in 2 ways, for example, as 39025009 + 1172889 = 6247^2 + 1083^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 773011 + ... + 773062.

Almost surely, 2^40197898 is an apocalyptic number.

40197898 is a deficient number, since it is larger than the sum of its proper divisors (24737210).

40197898 is a wasteful number, since it uses less digits than its factorization.

40197898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546088.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 40197898 is about 6340.1812276937. The cubic root of 40197898 is about 342.5582631271.

The spelling of 40197898 in words is "forty million, one hundred ninety-seven thousand, eight hundred ninety-eight".