820890514 has 8 divisors (see below), whose sum is σ = 1239179148. Its totient is φ = 407830800.

The previous prime is 820890503. The next prime is 820890517. The reversal of 820890514 is 415098028.

It can be written as a sum of positive squares in 2 ways, for example, as 790453225 + 30437289 = 28115^2 + 5517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×820890514² = 1347722471950368392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820890517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306837 + ... + 1307464.

Almost surely, 2^820890514 is an apocalyptic number.

820890514 is a deficient number, since it is larger than the sum of its proper divisors (418288634).

820890514 is a wasteful number, since it uses less digits than its factorization.

820890514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614460.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 820890514 is about 28651.1869562153. The cubic root of 820890514 is about 936.3288658897.

The spelling of 820890514 in words is "eight hundred twenty million, eight hundred ninety thousand, five hundred fourteen".