40681370 has 8 divisors (see below), whose sum is σ = 73226484. Its totient is φ = 16272544.

The previous prime is 40681349. The next prime is 40681423. The reversal of 40681370 is 7318604.

It can be written as a sum of positive squares in 2 ways, for example, as 39601849 + 1079521 = 6293^2 + 1039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034059 + ... + 2034078.

Almost surely, 2^40681370 is an apocalyptic number.

40681370 is a deficient number, since it is larger than the sum of its proper divisors (32545114).

40681370 is a wasteful number, since it uses less digits than its factorization.

40681370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068144.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40681370 is about 6378.1948857024. The cubic root of 40681370 is about 343.9261435547.

Adding to 40681370 its reverse (7318604), we get a palindrome (47999974).

The spelling of 40681370 in words is "forty million, six hundred eighty-one thousand, three hundred seventy".