40398236 has 6 divisors (see below), whose sum is σ = 70696920. Its totient is φ = 20199116.

The previous prime is 40398233. The next prime is 40398263. The reversal of 40398236 is 63289304.

It is a happy number.

40398236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40398196 and 40398205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398233) by changing a digit.

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 as a sum of consecutive naturals, namely, 5049776 + ... + 5049783.

It is an arithmetic number, because the mean of its divisors is an integer number (11782820).

Almost surely, 2^40398236 is an apocalyptic number.

It is an amenable number.

40398236 is a deficient number, since it is larger than the sum of its proper divisors (30298684).

40398236 is a wasteful number, since it uses less digits than its factorization.

40398236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099563 (or 10099561 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 40398236 is about 6355.9606669645. The cubic root of 40398236 is about 343.1264001611.

The spelling of 40398236 in words is "forty million, three hundred ninety-eight thousand, two hundred thirty-six".