861425892 has 36 divisors (see below), whose sum is σ = 2247737856. Its totient is φ = 277878960.

The previous prime is 861425891. The next prime is 861425893. The reversal of 861425892 is 298524168.

861425892 is a `hidden beast` number, since 8 + 61 + 4 + 2 + 589 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (861425891) and next prime (861425893).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (861425891) 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 11 ways as a sum of consecutive naturals, for example, 384828 + ... + 387059.

Almost surely, 2^861425892 is an apocalyptic number.

It is an amenable number.

861425892 is an abundant number, since it is smaller than the sum of its proper divisors (1386311964).

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

861425892 is a wasteful number, since it uses less digits than its factorization.

861425892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771928 (or 771923 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 861425892 is about 29350.0577852923. The cubic root of 861425892 is about 951.4938241409.

The spelling of 861425892 in words is "eight hundred sixty-one million, four hundred twenty-five thousand, eight hundred ninety-two".