40115398 has 16 divisors (see below), whose sum is σ = 62044560. Its totient is φ = 19443456.

The previous prime is 40115389. The next prime is 40115407. The reversal of 40115398 is 89351104.

It is an interprime number because it is at equal distance from previous prime (40115389) and next prime (40115407).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6286 + ... + 10942.

It is an arithmetic number, because the mean of its divisors is an integer number (3877785).

Almost surely, 2^40115398 is an apocalyptic number.

40115398 is a deficient number, since it is larger than the sum of its proper divisors (21929162).

40115398 is a wasteful number, since it uses less digits than its factorization.

40115398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 40115398 is about 6333.6717628876. The cubic root of 40115398 is about 342.3237532479.

It can be divided in two parts, 4011 and 5398, that added together give a square (9409 = 97²).

The spelling of 40115398 in words is "forty million, one hundred fifteen thousand, three hundred ninety-eight".