858778472 has 16 divisors (see below), whose sum is σ = 1621965060. Its totient is φ = 426254464.

The previous prime is 858778447. The next prime is 858778483. The reversal of 858778472 is 274877858.

It can be written as a sum of positive squares in 2 ways, for example, as 763637956 + 95140516 = 27634^2 + 9754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390683 + ... + 392874.

Almost surely, 2^858778472 is an apocalyptic number.

It is an amenable number.

858778472 is a deficient number, since it is larger than the sum of its proper divisors (763186588).

858778472 is a wasteful number, since it uses less digits than its factorization.

858778472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783700 (or 783696 counting only the distinct ones).

The product of its digits is 7024640, while the sum is 56.

The square root of 858778472 is about 29304.9223169078. The cubic root of 858778472 is about 950.5180819559.

It can be divided in two parts, 85877 and 8472, that added together give a palindrome (94349).

The spelling of 858778472 in words is "eight hundred fifty-eight million, seven hundred seventy-eight thousand, four hundred seventy-two".