40815398 has 16 divisors (see below), whose sum is σ = 66577056. Its totient is φ = 18653760.

The previous prime is 40815389. The next prime is 40815407. The reversal of 40815398 is 89351804.

It is an interprime number because it is at equal distance from previous prime (40815389) and next prime (40815407).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4943 + ... + 10298.

It is an arithmetic number, because the mean of its divisors is an integer number (4161066).

Almost surely, 2^40815398 is an apocalyptic number.

40815398 is a deficient number, since it is larger than the sum of its proper divisors (25761658).

40815398 is a wasteful number, since it uses less digits than its factorization.

40815398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 40815398 is about 6388.6929805712. The cubic root of 40815398 is about 344.3034268468.

The spelling of 40815398 in words is "forty million, eight hundred fifteen thousand, three hundred ninety-eight".