40460781 has 4 divisors (see below), whose sum is σ = 53947712. Its totient is φ = 26973852.

The previous prime is 40460779. The next prime is 40460821. The reversal of 40460781 is 18706404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40460781 - 2¹ = 40460779 is a prime.

It is a super-2 number, since 2×40460781² = 3274149598259922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40460711) 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, 6743461 + ... + 6743466.

It is an arithmetic number, because the mean of its divisors is an integer number (13486928).

Almost surely, 2^40460781 is an apocalyptic number.

It is an amenable number.

40460781 is a deficient number, since it is larger than the sum of its proper divisors (13486931).

40460781 is a wasteful number, since it uses less digits than its factorization.

40460781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13486930.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 40460781 is about 6360.8789486988. The cubic root of 40460781 is about 343.3033862297.

The spelling of 40460781 in words is "forty million, four hundred sixty thousand, seven hundred eighty-one".