40530280 has 32 divisors (see below), whose sum is σ = 104221440. Its totient is φ = 13896000.

The previous prime is 40530271. The next prime is 40530283. The reversal of 40530280 is 8203504.

It is not an unprimeable number, because it can be changed into a prime (40530283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72096 + ... + 72655.

It is an arithmetic number, because the mean of its divisors is an integer number (3256920).

Almost surely, 2^40530280 is an apocalyptic number.

40530280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40530280 is an abundant number, since it is smaller than the sum of its proper divisors (63691160).

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

40530280 is a wasteful number, since it uses less digits than its factorization.

40530280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144769 (or 144765 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40530280 is about 6366.3396076552. The cubic root of 40530280 is about 343.4998365005.

Adding to 40530280 its reverse (8203504), we get a palindrome (48733784).

The spelling of 40530280 in words is "forty million, five hundred thirty thousand, two hundred eighty".