80019540 has 36 divisors (see below), whose sum is σ = 242726484. Its totient is φ = 21338496.

The previous prime is 80019539. The next prime is 80019547. The reversal of 80019540 is 4591008.

It can be written as a sum of positive squares in 2 ways, for example, as 46703556 + 33315984 = 6834^2 + 5772^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80019547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222097 + ... + 222456.

Almost surely, 2^80019540 is an apocalyptic number.

It is an amenable number.

80019540 is an abundant number, since it is smaller than the sum of its proper divisors (162706944).

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

80019540 is a wasteful number, since it uses less digits than its factorization.

80019540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444568 (or 444563 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 80019540 is about 8945.3641625146. The cubic root of 80019540 is about 430.9220165288.

The spelling of 80019540 in words is "eighty million, nineteen thousand, five hundred forty".