40398726 has 8 divisors (see below), whose sum is σ = 80797464. Its totient is φ = 13466240.

The previous prime is 40398719. The next prime is 40398733. The reversal of 40398726 is 62789304.

40398726 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 (40398719) and next prime (40398733).

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

40398726 is an admirable number.

It is a congruent number.

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, 3366555 + ... + 3366566.

It is an arithmetic number, because the mean of its divisors is an integer number (10099683).

Almost surely, 2^40398726 is an apocalyptic number.

40398726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40398726 is a wasteful number, since it uses less digits than its factorization.

40398726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733126.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 40398726 is about 6355.9992133417. Note that the first 3 decimals coincide. The cubic root of 40398726 is about 343.1277874432.

The spelling of 40398726 in words is "forty million, three hundred ninety-eight thousand, seven hundred twenty-six".