870776640 has 168 divisors, whose sum is σ = 3012691968. Its totient is φ = 230845440.

The previous prime is 870776629. The next prime is 870776657. The reversal of 870776640 is 46677078.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549289 + ... + 550871.

Almost surely, 2^870776640 is an apocalyptic number.

870776640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870776640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506345984).

870776640 is an abundant number, since it is smaller than the sum of its proper divisors (2141915328).

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

870776640 is a wasteful number, since it uses less digits than its factorization.

870776640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 870776640 is about 29508.9247516747. The cubic root of 870776640 is about 954.9242522818.

The spelling of 870776640 in words is "eight hundred seventy million, seven hundred seventy-six thousand, six hundred forty".