868623540 has 48 divisors (see below), whose sum is σ = 2491473600. Its totient is φ = 225982720.

The previous prime is 868623529. The next prime is 868623541. The reversal of 868623540 is 45326868.

It is a junction number, because it is equal to n+sod(n) for n = 868623492 and 868623501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868623541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174090 + ... + 179009.

It is an arithmetic number, because the mean of its divisors is an integer number (51905700).

Almost surely, 2^868623540 is an apocalyptic number.

It is an amenable number.

868623540 is an abundant number, since it is smaller than the sum of its proper divisors (1622850060).

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

868623540 is a wasteful number, since it uses less digits than its factorization.

868623540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353152 (or 353150 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 868623540 is about 29472.4199888642. The cubic root of 868623540 is about 954.1365476616.

The spelling of 868623540 in words is "eight hundred sixty-eight million, six hundred twenty-three thousand, five hundred forty".