89780505 has 16 divisors (see below), whose sum is σ = 144405504. Its totient is φ = 47630720.

The previous prime is 89780503. The next prime is 89780513. The reversal of 89780505 is 50508798.

It is not a de Polignac number, because 89780505 - 2¹ = 89780503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89780503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12804 + ... + 18533.

It is an arithmetic number, because the mean of its divisors is an integer number (9025344).

Almost surely, 2^89780505 is an apocalyptic number.

It is an amenable number.

89780505 is a deficient number, since it is larger than the sum of its proper divisors (54624999).

89780505 is a wasteful number, since it uses less digits than its factorization.

89780505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31536.

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 89780505 is about 9475.2575162895. The cubic root of 89780505 is about 447.7758647781.

The spelling of 89780505 in words is "eighty-nine million, seven hundred eighty thousand, five hundred five".