988197428 has 6 divisors (see below), whose sum is σ = 1729345506. Its totient is φ = 494098712.

The previous prime is 988197409. The next prime is 988197449. The reversal of 988197428 is 824791889.

It can be written as a sum of positive squares in only one way, i.e., 987090724 + 1106704 = 31418^2 + 1052^2 .

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, 123524675 + ... + 123524682.

It is an arithmetic number, because the mean of its divisors is an integer number (288224251).

Almost surely, 2^988197428 is an apocalyptic number.

It is an amenable number.

988197428 is a deficient number, since it is larger than the sum of its proper divisors (741148078).

988197428 is a wasteful number, since it uses less digits than its factorization.

988197428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247049361 (or 247049359 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 56.

The square root of 988197428 is about 31435.6076448349. The cubic root of 988197428 is about 996.0502291835.

The spelling of 988197428 in words is "nine hundred eighty-eight million, one hundred ninety-seven thousand, four hundred twenty-eight".