820670455 has 8 divisors (see below), whose sum is σ = 1074332304. Its totient is φ = 596851200.

The previous prime is 820670441. The next prime is 820670467. The reversal of 820670455 is 554076028.

It is a happy number.

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

It is not a de Polignac number, because 820670455 - 2⁵ = 820670423 is a prime.

It is a super-3 number, since 3×820670455³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7460586 + ... + 7460695.

It is an arithmetic number, because the mean of its divisors is an integer number (134291538).

Almost surely, 2^820670455 is an apocalyptic number.

820670455 is a deficient number, since it is larger than the sum of its proper divisors (253661849).

820670455 is a wasteful number, since it uses less digits than its factorization.

820670455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14921297.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 820670455 is about 28647.3463867074. The cubic root of 820670455 is about 936.2451900908.

The spelling of 820670455 in words is "eight hundred twenty million, six hundred seventy thousand, four hundred fifty-five".