40398671 has 4 divisors (see below), whose sum is σ = 40422072. Its totient is φ = 40375272.

The previous prime is 40398661. The next prime is 40398703. The reversal of 40398671 is 17689304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40398671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8885 + ... + 12638.

It is an arithmetic number, because the mean of its divisors is an integer number (10105518).

Almost surely, 2^40398671 is an apocalyptic number.

40398671 is a deficient number, since it is larger than the sum of its proper divisors (23401).

40398671 is a wasteful number, since it uses less digits than its factorization.

40398671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23400.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 40398671 is about 6355.9948867192. The cubic root of 40398671 is about 343.1276317284.

The spelling of 40398671 in words is "forty million, three hundred ninety-eight thousand, six hundred seventy-one".