868249550 has 96 divisors (see below), whose sum is σ = 1950541824. Its totient is φ = 281232000.

The previous prime is 868249549. The next prime is 868249553. The reversal of 868249550 is 55942868.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 868249495 and 868249504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868249553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 465620 + ... + 467480.

It is an arithmetic number, because the mean of its divisors is an integer number (20318144).

Almost surely, 2^868249550 is an apocalyptic number.

868249550 is an abundant number, since it is smaller than the sum of its proper divisors (1082292274).

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

868249550 is a wasteful number, since it uses less digits than its factorization.

868249550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 868249550 is about 29466.0745604161. The cubic root of 868249550 is about 953.9995919932. Note that the first 3 decimals are identical.

The spelling of 868249550 in words is "eight hundred sixty-eight million, two hundred forty-nine thousand, five hundred fifty".