816990452 has 48 divisors (see below), whose sum is σ = 1523733120. Its totient is φ = 382491648.

The previous prime is 816990439. The next prime is 816990457. The reversal of 816990452 is 254099618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816990457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924803 + ... + 925685.

It is an arithmetic number, because the mean of its divisors is an integer number (31744440).

Almost surely, 2^816990452 is an apocalyptic number.

It is an amenable number.

816990452 is a deficient number, since it is larger than the sum of its proper divisors (706742668).

816990452 is a wasteful number, since it uses less digits than its factorization.

816990452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 816990452 is about 28583.0448343069. The cubic root of 816990452 is about 934.8436742852.

The spelling of 816990452 in words is "eight hundred sixteen million, nine hundred ninety thousand, four hundred fifty-two".