9739428 has 12 divisors (see below), whose sum is σ = 22725360. Its totient is φ = 3246472.

The previous prime is 9739417. The next prime is 9739451. The reversal of 9739428 is 8249379.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 9⁴ + 7⁶ + 3¹⁴ + 9⁷ + 4⁷ + 2⁷ + 8⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 9739428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405798 + ... + 405821.

It is an arithmetic number, because the mean of its divisors is an integer number (1893780).

Almost surely, 2^9739428 is an apocalyptic number.

It is an amenable number.

9739428 is an abundant number, since it is smaller than the sum of its proper divisors (12985932).

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

9739428 is a wasteful number, since it uses less digits than its factorization.

9739428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811626 (or 811624 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 9739428 is about 3120.8056652089. The cubic root of 9739428 is about 213.5556915487. Note that the first 3 decimals are identical.

It can be divided in two parts, 973 and 9428, that added together give a palindrome (10401).

The spelling of 9739428 in words is "nine million, seven hundred thirty-nine thousand, four hundred twenty-eight".