40607281 has 16 divisors (see below), whose sum is σ = 48525120. Its totient is φ = 33491520.

The previous prime is 40607267. The next prime is 40607291. The reversal of 40607281 is 18270604.

It is a cyclic number.

It is not a de Polignac number, because 40607281 - 2¹³ = 40599089 is a prime.

It is a super-2 number, since 2×40607281² = 3297902540425922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40607291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6031 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (3032820).

Almost surely, 2^40607281 is an apocalyptic number.

It is an amenable number.

40607281 is a deficient number, since it is larger than the sum of its proper divisors (7917839).

40607281 is a wasteful number, since it uses less digits than its factorization.

40607281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40607281 is about 6372.3842476737. The cubic root of 40607281 is about 343.7172303307.

Adding to 40607281 its reverse (18270604), we get a palindrome (58877885).

The spelling of 40607281 in words is "forty million, six hundred seven thousand, two hundred eighty-one".