40387743 has 18 divisors (see below), whose sum is σ = 64125152. Its totient is φ = 24476760.

The previous prime is 40387741. The next prime is 40387751. The reversal of 40387743 is 34778304.

It is not a de Polignac number, because 40387743 - 2¹ = 40387741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40387698 and 40387707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387741) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17455 + ... + 19632.

Almost surely, 2^40387743 is an apocalyptic number.

40387743 is a deficient number, since it is larger than the sum of its proper divisors (23737409).

40387743 is a wasteful number, since it uses less digits than its factorization.

40387743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37115 (or 37101 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 40387743 is about 6355.1351677207. The cubic root of 40387743 is about 343.0966898119.

It can be divided in two parts, 4038 and 7743, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 40387743 in words is "forty million, three hundred eighty-seven thousand, seven hundred forty-three".