8428634 has 8 divisors (see below), whose sum is σ = 13386708. Its totient is φ = 3966400.

The previous prime is 8428633. The next prime is 8428661. The reversal of 8428634 is 4368248.

It can be written as a sum of positive squares in 2 ways, for example, as 8427409 + 1225 = 2903^2 + 35^2 .

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

It is a super-2 number, since 2×8428634² = 142083742211912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8428594 and 8428603.

It is not an unprimeable number, because it can be changed into a prime (8428631) 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, 123917 + ... + 123984.

Almost surely, 2^8428634 is an apocalyptic number.

8428634 is a deficient number, since it is larger than the sum of its proper divisors (4958074).

8428634 is a wasteful number, since it uses less digits than its factorization.

8428634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247920.

The product of its digits is 36864, while the sum is 35.

The square root of 8428634 is about 2903.2109809657. The cubic root of 8428634 is about 203.5099895086.

The spelling of 8428634 in words is "eight million, four hundred twenty-eight thousand, six hundred thirty-four".