80645740 has 24 divisors (see below), whose sum is σ = 193550112. Its totient is φ = 27649920.

The previous prime is 80645731. The next prime is 80645753. The reversal of 80645740 is 4754608.

It is a junction number, because it is equal to n+sod(n) for n = 80645696 and 80645705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287881 + ... + 288160.

It is an arithmetic number, because the mean of its divisors is an integer number (8064588).

Almost surely, 2^80645740 is an apocalyptic number.

It is an amenable number.

80645740 is an abundant number, since it is smaller than the sum of its proper divisors (112904372).

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

80645740 is a wasteful number, since it uses less digits than its factorization.

80645740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576057 (or 576055 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 80645740 is about 8980.2973224721. The cubic root of 80645740 is about 432.0431698400.

The spelling of 80645740 in words is "eighty million, six hundred forty-five thousand, seven hundred forty".