468187821 has 12 divisors (see below), whose sum is σ = 690660672.
Its totient is φ = 305483976.
The previous prime is 468187799. The next prime is 468187829. The reversal of 468187821 is 128781864.
468187821 is a `hidden beast` number, since 468 + 187 + 8 + 2 + 1 = 666.
It is not a de Polignac number, because 468187821 - 214 = 468171437 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (468187829) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552991 + ... + 553836.
It is an arithmetic number, because the mean of its divisors is an integer number (57555056).
Almost surely, 2468187821 is an apocalyptic number.
It is an amenable number.
468187821 is a deficient number, since it is larger than the sum of its proper divisors (222472851).
468187821 is a wasteful number, since it uses less digits than its factorization.
468187821 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1106880 (or 1106877 counting only the distinct ones).
The product of its digits is 172032, while the sum is 45.
The square root of 468187821 is about 21637.6482317280.
The cubic root of 468187821 is about 776.4974563270.
The spelling of 468187821 in words is "four hundred sixty-eight million, one hundred eighty-seven thousand, eight hundred twenty-one".