861923568 has 40 divisors (see below), whose sum is σ = 2429058816. Its totient is φ = 261188800.

The previous prime is 861923567. The next prime is 861923609. The reversal of 861923568 is 865329168.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861923567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815688 + ... + 816743.

Almost surely, 2^861923568 is an apocalyptic number.

861923568 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

861923568 is an abundant number, since it is smaller than the sum of its proper divisors (1567135248).

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

861923568 is a wasteful number, since it uses less digits than its factorization.

861923568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632453 (or 1632447 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 861923568 is about 29358.5348408261. The cubic root of 861923568 is about 951.6770260009.

It can be divided in two parts, 861 and 923568, that added together give a palindrome (924429).

The spelling of 861923568 in words is "eight hundred sixty-one million, nine hundred twenty-three thousand, five hundred sixty-eight".