820270279 has 16 divisors (see below), whose sum is σ = 867594112. Its totient is φ = 774512928.

The previous prime is 820270237. The next prime is 820270289. The reversal of 820270279 is 972072028.

It is a cyclic number.

It is not a de Polignac number, because 820270279 - 2²³ = 811881671 is a prime.

It is a super-2 number, since 2×820270279² = 1345686661221475682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820270289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257752 + ... + 260914.

It is an arithmetic number, because the mean of its divisors is an integer number (54224632).

Almost surely, 2^820270279 is an apocalyptic number.

820270279 is a deficient number, since it is larger than the sum of its proper divisors (47323833).

820270279 is a wasteful number, since it uses less digits than its factorization.

820270279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 820270279 is about 28640.3610137861. The cubic root of 820270279 is about 936.0929878001.

The spelling of 820270279 in words is "eight hundred twenty million, two hundred seventy thousand, two hundred seventy-nine".