40043746 has 4 divisors (see below), whose sum is σ = 60065622. Its totient is φ = 20021872.

The previous prime is 40043741. The next prime is 40043747. The reversal of 40043746 is 64734004.

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., 24354225 + 15689521 = 4935^2 + 3961^2 .

It is not an unprimeable number, because it can be changed into a prime (40043741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010935 + ... + 10010938.

Almost surely, 2^40043746 is an apocalyptic number.

40043746 is a deficient number, since it is larger than the sum of its proper divisors (20021876).

40043746 is a wasteful number, since it uses less digits than its factorization.

40043746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021875.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 40043746 is about 6328.0128002399. The cubic root of 40043746 is about 342.1198182592.

It can be divided in two parts, 4004 and 3746, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 40043746 in words is "forty million, forty-three thousand, seven hundred forty-six".