8428637 has 12 divisors (see below), whose sum is σ = 10071900. Its totient is φ = 7027776.

The previous prime is 8428633. The next prime is 8428661. The reversal of 8428637 is 7368248.

It can be written as a sum of positive squares in 2 ways, for example, as 7958041 + 470596 = 2821^2 + 686^2 .

It is not a de Polignac number, because 8428637 - 2² = 8428633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8428637.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 512 + ... + 4137.

It is an arithmetic number, because the mean of its divisors is an integer number (839325).

Almost surely, 2^8428637 is an apocalyptic number.

It is an amenable number.

8428637 is a deficient number, since it is larger than the sum of its proper divisors (1643263).

8428637 is a wasteful number, since it uses less digits than its factorization.

8428637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700 (or 4693 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 8428637 is about 2903.2114976350. The cubic root of 8428637 is about 203.5100136536.

It can be divided in two parts, 842863 and 7, that multiplied together give a square (5900041 = 2429²).

The spelling of 8428637 in words is "eight million, four hundred twenty-eight thousand, six hundred thirty-seven".