870455880 has 384 divisors, whose sum is σ = 3434745600. Its totient is φ = 186955776.

The previous prime is 870455857. The next prime is 870455897. The reversal of 870455880 is 88554078.

870455880 = T₁₅ + T₁₆ + ... + T₁₇₃₄.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 3142302 + ... + 3142578.

It is an arithmetic number, because the mean of its divisors is an integer number (8944650).

Almost surely, 2^870455880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870455880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717372800).

870455880 is an abundant number, since it is smaller than the sum of its proper divisors (2564289720).

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

870455880 is a wasteful number, since it uses less digits than its factorization.

870455880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 870455880 is about 29503.4892851676. The cubic root of 870455880 is about 954.8069856539.

The spelling of 870455880 in words is "eight hundred seventy million, four hundred fifty-five thousand, eight hundred eighty".