856522480 has 40 divisors (see below), whose sum is σ = 2172454704. Its totient is φ = 311462400.

The previous prime is 856522463. The next prime is 856522519. The reversal of 856522480 is 84225658.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485781 + ... + 487540.

Almost surely, 2^856522480 is an apocalyptic number.

856522480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

856522480 is an abundant number, since it is smaller than the sum of its proper divisors (1315932224).

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

856522480 is a wasteful number, since it uses less digits than its factorization.

856522480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973345 (or 973339 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 856522480 is about 29266.4053139432. The cubic root of 856522480 is about 949.6850220793.

The spelling of 856522480 in words is "eight hundred fifty-six million, five hundred twenty-two thousand, four hundred eighty".