40298681 has 4 divisors (see below), whose sum is σ = 40414500. Its totient is φ = 40182864.

The previous prime is 40298669. The next prime is 40298683. The reversal of 40298681 is 18689204.

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 34916281 + 5382400 = 5909^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 40298681 - 2⁶ = 40298617 is a prime.

It is a super-3 number, since 3×40298681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40298683) 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, 57386 + ... + 58083.

It is an arithmetic number, because the mean of its divisors is an integer number (10103625).

Almost surely, 2^40298681 is an apocalyptic number.

It is an amenable number.

40298681 is a deficient number, since it is larger than the sum of its proper divisors (115819).

40298681 is a wasteful number, since it uses less digits than its factorization.

40298681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115818.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 40298681 is about 6348.1242111351. The cubic root of 40298681 is about 342.8443082414.

The spelling of 40298681 in words is "forty million, two hundred ninety-eight thousand, six hundred eighty-one".