40731530 has 32 divisors (see below), whose sum is σ = 85173120. Its totient is φ = 13734720.

The previous prime is 40731529. The next prime is 40731533. The reversal of 40731530 is 3513704.

It is a happy number.

It is a super-2 number, since 2×40731530² = 3318115072281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40731496 and 40731505.

It is not an unprimeable number, because it can be changed into a prime (40731533) 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, 500 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (2661660).

Almost surely, 2^40731530 is an apocalyptic number.

40731530 is an abundant number, since it is smaller than the sum of its proper divisors (44441590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40731530 is a wasteful number, since it uses less digits than its factorization.

40731530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 40731530 is about 6382.1258213858. The cubic root of 40731530 is about 344.0674387793.

The spelling of 40731530 in words is "forty million, seven hundred thirty-one thousand, five hundred thirty".