85400457 has 16 divisors (see below), whose sum is σ = 117165312. Its totient is φ = 55303040.

The previous prime is 85400453. The next prime is 85400479. The reversal of 85400457 is 75400458.

It is a cyclic number.

It is not a de Polignac number, because 85400457 - 2² = 85400453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85400453) 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 15 ways as a sum of consecutive naturals, for example, 17107 + ... + 21527.

It is an arithmetic number, because the mean of its divisors is an integer number (7322832).

Almost surely, 2^85400457 is an apocalyptic number.

It is an amenable number.

85400457 is a deficient number, since it is larger than the sum of its proper divisors (31764855).

85400457 is a wasteful number, since it uses less digits than its factorization.

85400457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 85400457 is about 9241.2367678791. The cubic root of 85400457 is about 440.3723724441.

Subtracting from 85400457 its reverse (75400458), we obtain a palindrome (9999999).

The spelling of 85400457 in words is "eighty-five million, four hundred thousand, four hundred fifty-seven".