40312530 has 48 divisors (see below), whose sum is σ = 105168024. Its totient is φ = 10713600.

The previous prime is 40312529. The next prime is 40312549. The reversal of 40312530 is 3521304.

It can be written as a sum of positive squares in 4 ways, for example, as 33977241 + 6335289 = 5829^2 + 2517^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35532 + ... + 36648.

Almost surely, 2^40312530 is an apocalyptic number.

40312530 is an abundant number, since it is smaller than the sum of its proper divisors (64855494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40312530 is a wasteful number, since it uses less digits than its factorization.

40312530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 40312530 is about 6349.2149120974. The cubic root of 40312530 is about 342.8835775749.

Adding to 40312530 its reverse (3521304), we get a palindrome (43833834).

It can be divided in two parts, 4031 and 2530, that added together give a 8-th power (6561 = 3⁸).

The spelling of 40312530 in words is "forty million, three hundred twelve thousand, five hundred thirty".