816417880 has 32 divisors (see below), whose sum is σ = 1859079600. Its totient is φ = 322631296.

The previous prime is 816417827. The next prime is 816417887. The reversal of 816417880 is 88714618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816417887) 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, 119635 + ... + 126274.

Almost surely, 2^816417880 is an apocalyptic number.

It is an amenable number.

816417880 is an abundant number, since it is smaller than the sum of its proper divisors (1042661720).

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

816417880 is a wasteful number, since it uses less digits than its factorization.

816417880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246003 (or 245999 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 816417880 is about 28573.0271409944. The cubic root of 816417880 is about 934.6252341949.

The spelling of 816417880 in words is "eight hundred sixteen million, four hundred seventeen thousand, eight hundred eighty".