40394737 has 4 divisors (see below), whose sum is σ = 42770916. Its totient is φ = 38018560.

The previous prime is 40394729. The next prime is 40394743. The reversal of 40394737 is 73749304.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30129121 + 10265616 = 5489^2 + 3204^2 .

It is a cyclic number.

It is not a de Polignac number, because 40394737 - 2³ = 40394729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40394696 and 40394705.

It is not an unprimeable number, because it can be changed into a prime (40397737) 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, 1188064 + ... + 1188097.

It is an arithmetic number, because the mean of its divisors is an integer number (10692729).

Almost surely, 2^40394737 is an apocalyptic number.

It is an amenable number.

40394737 is a deficient number, since it is larger than the sum of its proper divisors (2376179).

40394737 is a wasteful number, since it uses less digits than its factorization.

40394737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376178.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 40394737 is about 6355.6854075701. The cubic root of 40394737 is about 343.1164935079.

The spelling of 40394737 in words is "forty million, three hundred ninety-four thousand, seven hundred thirty-seven".