816451442 has 32 divisors (see below), whose sum is σ = 1285372800. Its totient is φ = 388450048.

The previous prime is 816451397. The next prime is 816451453. The reversal of 816451442 is 244154618.

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, 2274059 + ... + 2274417.

It is an arithmetic number, because the mean of its divisors is an integer number (40167900).

Almost surely, 2^816451442 is an apocalyptic number.

816451442 is a deficient number, since it is larger than the sum of its proper divisors (468921358).

816451442 is a wasteful number, since it uses less digits than its factorization.

816451442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its digits is 30720, while the sum is 35.

The square root of 816451442 is about 28573.6144370991. The cubic root of 816451442 is about 934.6380411422.

The spelling of 816451442 in words is "eight hundred sixteen million, four hundred fifty-one thousand, four hundred forty-two".