7971628 has 12 divisors (see below), whose sum is σ = 15943312. Its totient is φ = 3416400.

The previous prime is 7971617. The next prime is 7971643. The reversal of 7971628 is 8261797.

7971628 is an admirable number.

It is a d-powerful number, because it can be written as 7⁴ + 9 + 7⁸ + 1 + 6⁸ + 2¹⁹ + 8³ .

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, 142323 + ... + 142378.

Almost surely, 2^7971628 is an apocalyptic number.

It is an amenable number.

7971628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7971628 is a wasteful number, since it uses less digits than its factorization.

7971628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284712 (or 284710 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 7971628 is about 2823.4071615692. The cubic root of 7971628 is about 199.7632866111.

The spelling of 7971628 in words is "seven million, nine hundred seventy-one thousand, six hundred twenty-eight".