80495640 has 128 divisors (see below), whose sum is σ = 272260800. Its totient is φ = 21150720.

The previous prime is 80495617. The next prime is 80495651. The reversal of 80495640 is 4659408.

80495640 is a `hidden beast` number, since 8 + 0 + 4 + 9 + 5 + 640 = 666.

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 = 80495595 and 80495604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78330 + ... + 79350.

Almost surely, 2^80495640 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 80495640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136130400).

80495640 is an abundant number, since it is smaller than the sum of its proper divisors (191765160).

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

80495640 is a wasteful number, since it uses less digits than its factorization.

80495640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 80495640 is about 8971.9362458725. The cubic root of 80495640 is about 431.7749599516.

It can be divided in two parts, 8049 and 5640, that added together give a square (13689 = 117²).

The spelling of 80495640 in words is "eighty million, four hundred ninety-five thousand, six hundred forty".