816886942 has 8 divisors (see below), whose sum is σ = 1229990256. Its totient is φ = 406890192.

The previous prime is 816886901. The next prime is 816886949. The reversal of 816886942 is 249688618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×816886942² = 1334608552020222728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816886942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816886949) 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, 775983 + ... + 777034.

It is an arithmetic number, because the mean of its divisors is an integer number (153748782).

Almost surely, 2^816886942 is an apocalyptic number.

816886942 is a deficient number, since it is larger than the sum of its proper divisors (413103314).

816886942 is a wasteful number, since it uses less digits than its factorization.

816886942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553282.

The product of its digits is 1327104, while the sum is 52.

The square root of 816886942 is about 28581.2340881215. The cubic root of 816886942 is about 934.8041920794.

The spelling of 816886942 in words is "eight hundred sixteen million, eight hundred eighty-six thousand, nine hundred forty-two".