814669890 has 64 divisors (see below), whose sum is σ = 2078804736. Its totient is φ = 203869952.

The previous prime is 814669829. The next prime is 814669901. The reversal of 814669890 is 98966418.

It is a happy number.

It is a super-2 number, since 2×814669890² = 1327374059345224200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25432 + ... + 47708.

It is an arithmetic number, because the mean of its divisors is an integer number (32481324).

Almost surely, 2^814669890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 814669890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039402368).

814669890 is an abundant number, since it is smaller than the sum of its proper divisors (1264134846).

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

814669890 is a wasteful number, since it uses less digits than its factorization.

814669890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22363.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 814669890 is about 28542.4226371904. The cubic root of 814669890 is about 933.9577317036.

The spelling of 814669890 in words is "eight hundred fourteen million, six hundred sixty-nine thousand, eight hundred ninety".