862139472 has 80 divisors (see below), whose sum is σ = 2291103360. Its totient is φ = 279193600.

The previous prime is 862139461. The next prime is 862139477. The reversal of 862139472 is 274931268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862139477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552229 + ... + 553787.

It is an arithmetic number, because the mean of its divisors is an integer number (28638792).

Almost surely, 2^862139472 is an apocalyptic number.

862139472 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 862139472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1145551680).

862139472 is an abundant number, since it is smaller than the sum of its proper divisors (1428963888).

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

862139472 is a wasteful number, since it uses less digits than its factorization.

862139472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892 (or 1886 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 862139472 is about 29362.2116333222. The cubic root of 862139472 is about 951.7564815081.

The spelling of 862139472 in words is "eight hundred sixty-two million, one hundred thirty-nine thousand, four hundred seventy-two".