842412728 has 32 divisors (see below), whose sum is σ = 1686096000. Its totient is φ = 393412320.

The previous prime is 842412721. The next prime is 842412737. The reversal of 842412728 is 827214248.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 842412691 and 842412700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842412721) 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, 28238 + ... + 49821.

It is an arithmetic number, because the mean of its divisors is an integer number (52690500).

Almost surely, 2^842412728 is an apocalyptic number.

It is an amenable number.

842412728 is an abundant number, since it is smaller than the sum of its proper divisors (843683272).

842412728 is a wasteful number, since it uses less digits than its factorization.

842412728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78155 (or 78151 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 842412728 is about 29024.3471588940. The cubic root of 842412728 is about 944.4413065189.

The spelling of 842412728 in words is "eight hundred forty-two million, four hundred twelve thousand, seven hundred twenty-eight".