40398737 has 4 divisors (see below), whose sum is σ = 40422180. Its totient is φ = 40375296.

The previous prime is 40398733. The next prime is 40398751. The reversal of 40398737 is 73789304.

40398737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 6356²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1073296 + 39325441 = 1036^2 + 6271^2 .

It is a cyclic number.

It is not a de Polignac number, because 40398737 - 2² = 40398733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40398694 and 40398703.

It is not an unprimeable number, because it can be changed into a prime (40398733) 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 in 3 ways as a sum of consecutive naturals, for example, 8912 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (10105545).

Almost surely, 2^40398737 is an apocalyptic number.

It is an amenable number.

40398737 is a deficient number, since it is larger than the sum of its proper divisors (23443).

40398737 is a wasteful number, since it uses less digits than its factorization.

40398737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23442.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 40398737 is about 6356.0000786658. Note that the first 4 decimals coincide. The cubic root of 40398737 is about 343.1278185862.

The spelling of 40398737 in words is "forty million, three hundred ninety-eight thousand, seven hundred thirty-seven".