842172680 has 16 divisors (see below), whose sum is σ = 1894888620. Its totient is φ = 336869056.

The previous prime is 842172679. The next prime is 842172689. The reversal of 842172680 is 86271248.

It can be written as a sum of positive squares in 2 ways, for example, as 830707684 + 11464996 = 28822^2 + 3386^2 .

It is not an unprimeable number, because it can be changed into a prime (842172689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10527119 + ... + 10527198.

Almost surely, 2^842172680 is an apocalyptic number.

It is an amenable number.

842172680 is an abundant number, since it is smaller than the sum of its proper divisors (1052715940).

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

842172680 is a wasteful number, since it uses less digits than its factorization.

842172680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054328 (or 21054324 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 842172680 is about 29020.2115774506. The cubic root of 842172680 is about 944.3515908816.

The spelling of 842172680 in words is "eight hundred forty-two million, one hundred seventy-two thousand, six hundred eighty".