855132720 has 80 divisors (see below), whose sum is σ = 2854838112. Its totient is φ = 210493440.

The previous prime is 855132703. The next prime is 855132721. The reversal of 855132720 is 27231558.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (855132721) 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, 133921 + ... + 140160.

Almost surely, 2^855132720 is an apocalyptic number.

855132720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

855132720 is an abundant number, since it is smaller than the sum of its proper divisors (1999705392).

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

855132720 is a wasteful number, since it uses less digits than its factorization.

855132720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274110 (or 274104 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 855132720 is about 29242.6524104774. The cubic root of 855132720 is about 949.1711033873.

The spelling of 855132720 in words is "eight hundred fifty-five million, one hundred thirty-two thousand, seven hundred twenty".