85400280 has 96 divisors (see below), whose sum is σ = 317210400. Its totient is φ = 19519488.

The previous prime is 85400251. The next prime is 85400281. The reversal of 85400280 is 8200458.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85400281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14425 + ... + 19464.

It is an arithmetic number, because the mean of its divisors is an integer number (3304275).

Almost surely, 2^85400280 is an apocalyptic number.

It is an amenable number.

85400280 is an abundant number, since it is smaller than the sum of its proper divisors (231810120).

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

85400280 is a wasteful number, since it uses less digits than its factorization.

85400280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33913 (or 33906 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 85400280 is about 9241.2271912339. The cubic root of 85400280 is about 440.3720682070.

The spelling of 85400280 in words is "eighty-five million, four hundred thousand, two hundred eighty".