40312280 has 16 divisors (see below), whose sum is σ = 90702720. Its totient is φ = 16124896.

The previous prime is 40312271. The next prime is 40312289. The reversal of 40312280 is 8221304.

It is an interprime number because it is at equal distance from previous prime (40312271) and next prime (40312289).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40312289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503864 + ... + 503943.

It is an arithmetic number, because the mean of its divisors is an integer number (5668920).

Almost surely, 2^40312280 is an apocalyptic number.

40312280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40312280 is an abundant number, since it is smaller than the sum of its proper divisors (50390440).

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

40312280 is a wasteful number, since it uses less digits than its factorization.

40312280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007818 (or 1007814 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40312280 is about 6349.1952245934. The cubic root of 40312280 is about 342.8828687707.

Adding to 40312280 its reverse (8221304), we get a palindrome (48533584).

The spelling of 40312280 in words is "forty million, three hundred twelve thousand, two hundred eighty".