867251538 has 12 divisors (see below), whose sum is σ = 1879045038. Its totient is φ = 289083840.

The previous prime is 867251537. The next prime is 867251569. The reversal of 867251538 is 835152768.

867251538 is a `hidden beast` number, since 8 + 67 + 2 + 51 + 538 = 666.

867251538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 781929369 + 85322169 = 27963^2 + 9237^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 867251493 and 867251502.

It is not an unprimeable number, because it can be changed into a prime (867251531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24090303 + ... + 24090338.

Almost surely, 2^867251538 is an apocalyptic number.

867251538 is an abundant number, since it is smaller than the sum of its proper divisors (1011793500).

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

867251538 is a wasteful number, since it uses less digits than its factorization.

867251538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48180649 (or 48180646 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 867251538 is about 29449.1347580875. The cubic root of 867251538 is about 953.6339259728.

It can be divided in two parts, 867 and 251538, that added together give a triangular number (252405 = T₇₁₀).

The spelling of 867251538 in words is "eight hundred sixty-seven million, two hundred fifty-one thousand, five hundred thirty-eight".