80631240 has 64 divisors (see below), whose sum is σ = 242948160. Its totient is φ = 21408000.

The previous prime is 80631233. The next prime is 80631247. The reversal of 80631240 is 4213608.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80631233) and next prime (80631247).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 80631240.

It is not an unprimeable number, because it can be changed into a prime (80631247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28782 + ... + 31458.

It is an arithmetic number, because the mean of its divisors is an integer number (3796065).

Almost surely, 2^80631240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80631240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121474080).

80631240 is an abundant number, since it is smaller than the sum of its proper divisors (162316920).

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

80631240 is a wasteful number, since it uses less digits than its factorization.

80631240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 80631240 is about 8979.4899632440. The cubic root of 80631240 is about 432.0172746864.

Adding to 80631240 its reverse (4213608), we get a palindrome (84844848).

The spelling of 80631240 in words is "eighty million, six hundred thirty-one thousand, two hundred forty".