816786408 has 32 divisors (see below), whose sum is σ = 2042676000. Its totient is φ = 272167488.

The previous prime is 816786407. The next prime is 816786409. The reversal of 816786408 is 804687618.

It is an interprime number because it is at equal distance from previous prime (816786407) and next prime (816786409).

It is not an unprimeable number, because it can be changed into a prime (816786407) 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, 114943 + ... + 121841.

It is an arithmetic number, because the mean of its divisors is an integer number (63833625).

Almost surely, 2^816786408 is an apocalyptic number.

It is an amenable number.

816786408 is an abundant number, since it is smaller than the sum of its proper divisors (1225889592).

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

816786408 is a wasteful number, since it uses less digits than its factorization.

816786408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11841 (or 11837 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 816786408 is about 28579.4752925942. The cubic root of 816786408 is about 934.7658418274.

The spelling of 816786408 in words is "eight hundred sixteen million, seven hundred eighty-six thousand, four hundred eight".