80780538 has 16 divisors (see below), whose sum is σ = 161818560. Its totient is φ = 26883936.

The previous prime is 80780521. The next prime is 80780551. The reversal of 80780538 is 83508708.

It is a junction number, because it is equal to n+sod(n) for n = 80780496 and 80780505.

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, 6523 + ... + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (10113660).

Almost surely, 2^80780538 is an apocalyptic number.

80780538 is an abundant number, since it is smaller than the sum of its proper divisors (81038022).

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

80780538 is a wasteful number, since it uses less digits than its factorization.

80780538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21461.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 80780538 is about 8987.7993969603. The cubic root of 80780538 is about 432.2837534800.

It can be divided in two parts, 80780 and 538, that added together give a palindrome (81318).

The spelling of 80780538 in words is "eighty million, seven hundred eighty thousand, five hundred thirty-eight".