80645700 has 36 divisors (see below), whose sum is σ = 233335760. Its totient is φ = 21505440.

The previous prime is 80645687. The next prime is 80645731. The reversal of 80645700 is 754608.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134110 + ... + 134709.

Almost surely, 2^80645700 is an apocalyptic number.

It is an amenable number.

80645700 is an abundant number, since it is smaller than the sum of its proper divisors (152690060).

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

80645700 is a wasteful number, since it uses less digits than its factorization.

80645700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268836 (or 268829 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 80645700 is about 8980.2950953741. The cubic root of 80645700 is about 432.0430984093.

The spelling of 80645700 in words is "eighty million, six hundred forty-five thousand, seven hundred".