40651738 has 8 divisors (see below), whose sum is σ = 61287732. Its totient is φ = 20222496.

The previous prime is 40651703. The next prime is 40651739. The reversal of 40651738 is 83715604.

It can be written as a sum of positive squares in 2 ways, for example, as 37613689 + 3038049 = 6133^2 + 1743^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40651739) 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, 51195 + ... + 51982.

Almost surely, 2^40651738 is an apocalyptic number.

40651738 is a deficient number, since it is larger than the sum of its proper divisors (20635994).

40651738 is a wasteful number, since it uses less digits than its factorization.

40651738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103376.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 40651738 is about 6375.8715482670. The cubic root of 40651738 is about 343.8426188775.

The spelling of 40651738 in words is "forty million, six hundred fifty-one thousand, seven hundred thirty-eight".