816976540 has 24 divisors (see below), whose sum is σ = 1744732080. Its totient is φ = 321251328.

The previous prime is 816976499. The next prime is 816976541. The reversal of 816976540 is 45679618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816976541) 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, 344997 + ... + 347356.

It is an arithmetic number, because the mean of its divisors is an integer number (72697170).

Almost surely, 2^816976540 is an apocalyptic number.

It is an amenable number.

816976540 is an abundant number, since it is smaller than the sum of its proper divisors (927755540).

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

816976540 is a wasteful number, since it uses less digits than its factorization.

816976540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692421 (or 692419 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 816976540 is about 28582.8014722140. The cubic root of 816976540 is about 934.8383679731.

The spelling of 816976540 in words is "eight hundred sixteen million, nine hundred seventy-six thousand, five hundred forty".