40509535 has 16 divisors (see below), whose sum is σ = 54162432. Its totient is φ = 28832800.

The previous prime is 40509499. The next prime is 40509559. The reversal of 40509535 is 53590504.

It is not a de Polignac number, because 40509535 - 2⁷ = 40509407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40509497 and 40509506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5251 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (3385152).

Almost surely, 2^40509535 is an apocalyptic number.

40509535 is a deficient number, since it is larger than the sum of its proper divisors (13652897).

40509535 is a wasteful number, since it uses less digits than its factorization.

40509535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15734.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 40509535 is about 6364.7101269422. The cubic root of 40509535 is about 343.4412208990.

The spelling of 40509535 in words is "forty million, five hundred nine thousand, five hundred thirty-five".