842788 has 12 divisors (see below), whose sum is σ = 1489180. Its totient is φ = 417312.

The previous prime is 842771. The next prime is 842791. The reversal of 842788 is 887248.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 262144 = 762^2 + 512^2 .

It is a super-2 number, since 2×842788² = 1420583225888, which contains 22 as substring.

It is a plaindrome in base 13 and base 15.

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, 531 + ... + 1402.

2⁸⁴²⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

842788 is a deficient number, since it is larger than the sum of its proper divisors (646392).

842788 is a wasteful number, since it uses less digits than its factorization.

842788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046 (or 2044 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 842788 is about 918.0348577260. The cubic root of 842788 is about 94.4581526687.

It can be divided in two parts, 8427 and 88, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 842788 in words is "eight hundred forty-two thousand, seven hundred eighty-eight".