80535780 has 144 divisors (see below), whose sum is σ = 266133504. Its totient is φ = 19595520.

The previous prime is 80535761. The next prime is 80535823. The reversal of 80535780 is 8753508.

It is a happy number.

80535780 is a `hidden beast` number, since 80 + 5 + 3 + 578 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297045 + ... + 297315.

Almost surely, 2^80535780 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 80535780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133066752).

80535780 is an abundant number, since it is smaller than the sum of its proper divisors (185597724).

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

80535780 is a wasteful number, since it uses less digits than its factorization.

80535780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 80535780 is about 8974.1729423942. The cubic root of 80535780 is about 431.8467177382.

It can be divided in two parts, 805 and 35780, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 80535780 in words is "eighty million, five hundred thirty-five thousand, seven hundred eighty".