40530591 has 48 divisors (see below), whose sum is σ = 66163200. Its totient is φ = 24442560.

The previous prime is 40530571. The next prime is 40530617. The reversal of 40530591 is 19503504.

40530591 is a `hidden beast` number, since 40 + 5 + 30 + 591 = 666.

It is not a de Polignac number, because 40530591 - 2¹³ = 40522399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40530541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 862330 + ... + 862376.

It is an arithmetic number, because the mean of its divisors is an integer number (1378400).

Almost surely, 2^40530591 is an apocalyptic number.

40530591 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40530591 is a deficient number, since it is larger than the sum of its proper divisors (25632609).

40530591 is a wasteful number, since it uses less digits than its factorization.

40530591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 40530591 is about 6366.3640329469. The cubic root of 40530591 is about 343.5007150878.

The spelling of 40530591 in words is "forty million, five hundred thirty thousand, five hundred ninety-one".