7890128 has 10 divisors (see below), whose sum is σ = 15287154. Its totient is φ = 3945056.

The previous prime is 7890119. The next prime is 7890137. The reversal of 7890128 is 8210987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7890119) and next prime (7890137).

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 94864 = 2792^2 + 308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246551 + ... + 246582.

Almost surely, 2^7890128 is an apocalyptic number.

It is an amenable number.

7890128 is a deficient number, since it is larger than the sum of its proper divisors (7397026).

7890128 is a wasteful number, since it uses less digits than its factorization.

7890128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493141 (or 493135 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 7890128 is about 2808.9371655486. The cubic root of 7890128 is about 199.0801761054.

The spelling of 7890128 in words is "seven million, eight hundred ninety thousand, one hundred twenty-eight".