40807738 has 4 divisors (see below), whose sum is σ = 61211610. Its totient is φ = 20403868.

The previous prime is 40807733. The next prime is 40807771. The reversal of 40807738 is 83770804.

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

It can be written as a sum of positive squares in only one way, i.e., 34187409 + 6620329 = 5847^2 + 2573^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40807697 and 40807706.

It is not an unprimeable number, because it can be changed into a prime (40807733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201933 + ... + 10201936.

Almost surely, 2^40807738 is an apocalyptic number.

40807738 is a deficient number, since it is larger than the sum of its proper divisors (20403872).

40807738 is a wasteful number, since it uses less digits than its factorization.

40807738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20403871.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 40807738 is about 6388.0934557973. The cubic root of 40807738 is about 344.2818865346.

The spelling of 40807738 in words is "forty million, eight hundred seven thousand, seven hundred thirty-eight".