7988770428 has 24 divisors (see below), whose sum is σ = 18706808400. Its totient is φ = 2653445760.

The previous prime is 7988770423. The next prime is 7988770429. The reversal of 7988770428 is 8240778897.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988770421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181203 + ... + 1187946.

It is an arithmetic number, because the mean of its divisors is an integer number (779450350).

Almost surely, 2^7988770428 is an apocalyptic number.

It is an amenable number.

7988770428 is an abundant number, since it is smaller than the sum of its proper divisors (10718037972).

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

7988770428 is a wasteful number, since it uses less digits than its factorization.

7988770428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369437 (or 2369435 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 60.

The square root of 7988770428 is about 89379.9218393035. The cubic root of 7988770428 is about 1999.0637641329.

The spelling of 7988770428 in words is "seven billion, nine hundred eighty-eight million, seven hundred seventy thousand, four hundred twenty-eight".