816880740 has 48 divisors (see below), whose sum is σ = 2463211968. Its totient is φ = 201078144.

The previous prime is 816880739. The next prime is 816880759. The reversal of 816880740 is 47088618.

It is a junction number, because it is equal to n+sod(n) for n = 816880692 and 816880701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522862 + ... + 524421.

It is an arithmetic number, because the mean of its divisors is an integer number (51316916).

Almost surely, 2^816880740 is an apocalyptic number.

It is an amenable number.

816880740 is an abundant number, since it is smaller than the sum of its proper divisors (1646331228).

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

816880740 is a wasteful number, since it uses less digits than its factorization.

816880740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047308 (or 1047306 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 816880740 is about 28581.1255901513. The cubic root of 816880740 is about 934.8018263214.

The spelling of 816880740 in words is "eight hundred sixteen million, eight hundred eighty thousand, seven hundred forty".