80963640 has 96 divisors (see below), whose sum is σ = 264513600. Its totient is φ = 21477120.

The previous prime is 80963629. The next prime is 80963647. The reversal of 80963640 is 4636908.

80963640 is a `hidden beast` number, since 8 + 0 + 9 + 6 + 3 + 640 = 666.

It is a super-2 number, since 2×80963640² = 13110222004099200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80963595 and 80963604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80963647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85570 + ... + 86510.

It is an arithmetic number, because the mean of its divisors is an integer number (2755350).

Almost surely, 2^80963640 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 80963640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132256800).

80963640 is an abundant number, since it is smaller than the sum of its proper divisors (183549960).

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

80963640 is a wasteful number, since it uses less digits than its factorization.

80963640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 80963640 is about 8997.9797732602. The cubic root of 80963640 is about 432.6101204219.

The spelling of 80963640 in words is "eighty million, nine hundred sixty-three thousand, six hundred forty".