676421028 has 18 divisors (see below), whose sum is σ = 1709842134. Its totient is φ = 225473664.

The previous prime is 676420951. The next prime is 676421069. The reversal of 676421028 is 820124676.

676421028 is a `hidden beast` number, since 6 + 7 + 642 + 1 + 0 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 632623104 + 43797924 = 25152^2 + 6618^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18789473 = 676421028 / (6 + 7 + 6 + 4 + 2 + 1 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 676420983 and 676421001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9394701 + ... + 9394772.

Almost surely, 2^676421028 is an apocalyptic number.

It is an amenable number.

676421028 is an abundant number, since it is smaller than the sum of its proper divisors (1033421106).

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

676421028 is a wasteful number, since it uses less digits than its factorization.

676421028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18789483 (or 18789478 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 676421028 is about 26008.0954319996. The cubic root of 676421028 is about 877.8204620071.

The spelling of 676421028 in words is "six hundred seventy-six million, four hundred twenty-one thousand, twenty-eight".