85545780 has 48 divisors (see below), whose sum is σ = 242821824. Its totient is φ = 22498560.

The previous prime is 85545769. The next prime is 85545787. The reversal of 85545780 is 8754558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85545787) 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, 5386 + ... + 14145.

It is an arithmetic number, because the mean of its divisors is an integer number (5058788).

Almost surely, 2^85545780 is an apocalyptic number.

It is an amenable number.

85545780 is an abundant number, since it is smaller than the sum of its proper divisors (157276044).

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

85545780 is a wasteful number, since it uses less digits than its factorization.

85545780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616 (or 19614 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 85545780 is about 9249.0961720592. The cubic root of 85545780 is about 440.6220196972.

The spelling of 85545780 in words is "eighty-five million, five hundred forty-five thousand, seven hundred eighty".