40806398 has 32 divisors (see below), whose sum is σ = 65463552. Its totient is φ = 19051200.

The previous prime is 40806397. The next prime is 40806413. The reversal of 40806398 is 89360804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40806397) 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, 250265 + ... + 250427.

It is an arithmetic number, because the mean of its divisors is an integer number (2045736).

Almost surely, 2^40806398 is an apocalyptic number.

40806398 is a deficient number, since it is larger than the sum of its proper divisors (24657154).

40806398 is a wasteful number, since it uses less digits than its factorization.

40806398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40806398 is about 6387.9885723129. The cubic root of 40806398 is about 344.2781181089.

The spelling of 40806398 in words is "forty million, eight hundred six thousand, three hundred ninety-eight".