861958530 has 32 divisors (see below), whose sum is σ = 2298556800. Its totient is φ = 229855536.

The previous prime is 861958477. The next prime is 861958571. The reversal of 861958530 is 35859168.

861958530 is a `hidden beast` number, since 8 + 61 + 9 + 58 + 530 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1595950 + ... + 1596489.

It is an arithmetic number, because the mean of its divisors is an integer number (71829900).

Almost surely, 2^861958530 is an apocalyptic number.

861958530 is an abundant number, since it is smaller than the sum of its proper divisors (1436598270).

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

861958530 is a wasteful number, since it uses less digits than its factorization.

861958530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192455 (or 3192449 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 861958530 is about 29359.1302664095. The cubic root of 861958530 is about 951.6898933762.

The spelling of 861958530 in words is "eight hundred sixty-one million, nine hundred fifty-eight thousand, five hundred thirty".