858772542 has 16 divisors (see below), whose sum is σ = 1720354320. Its totient is φ = 285789312.

The previous prime is 858772517. The next prime is 858772543. The reversal of 858772542 is 245277858.

It is a junction number, because it is equal to n+sod(n) for n = 858772491 and 858772500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858772543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113067 + ... + 120422.

It is an arithmetic number, because the mean of its divisors is an integer number (107522145).

Almost surely, 2^858772542 is an apocalyptic number.

858772542 is an abundant number, since it is smaller than the sum of its proper divisors (861581778).

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

858772542 is a wasteful number, since it uses less digits than its factorization.

858772542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234107.

The product of its digits is 1254400, while the sum is 48.

The square root of 858772542 is about 29304.8211391914. The cubic root of 858772542 is about 950.5158941254.

The spelling of 858772542 in words is "eight hundred fifty-eight million, seven hundred seventy-two thousand, five hundred forty-two".