40681534 has 12 divisors (see below), whose sum is σ = 61564104. Its totient is φ = 20161032.

The previous prime is 40681499. The next prime is 40681559. The reversal of 40681534 is 43518604.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40681496 and 40681505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116392 + ... + 116740.

It is an arithmetic number, because the mean of its divisors is an integer number (5130342).

Almost surely, 2^40681534 is an apocalyptic number.

40681534 is a deficient number, since it is larger than the sum of its proper divisors (20882570).

40681534 is an equidigital number, since it uses as much as digits as its factorization.

40681534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 40681534 is about 6378.2077419915. The cubic root of 40681534 is about 343.9266057140.

The spelling of 40681534 in words is "forty million, six hundred eighty-one thousand, five hundred thirty-four".