40681078 has 4 divisors (see below), whose sum is σ = 61021620. Its totient is φ = 20340538.

The previous prime is 40681073. The next prime is 40681159. The reversal of 40681078 is 87018604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40681073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170268 + ... + 10170271.

It is an arithmetic number, because the mean of its divisors is an integer number (15255405).

Almost surely, 2^40681078 is an apocalyptic number.

40681078 is a deficient number, since it is larger than the sum of its proper divisors (20340542).

40681078 is a wasteful number, since it uses less digits than its factorization.

40681078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340541.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 40681078 is about 6378.1719951723. The cubic root of 40681078 is about 343.9253206828.

The spelling of 40681078 in words is "forty million, six hundred eighty-one thousand, seventy-eight".