1988097228 has 36 divisors (see below), whose sum is σ = 5412043728. Its totient is φ = 611722080.

The previous prime is 1988097211. The next prime is 1988097229. The reversal of 1988097228 is 8227908891.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1988097229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2123568 + ... + 2124503.

It is an arithmetic number, because the mean of its divisors is an integer number (150334548).

Almost surely, 2^1988097228 is an apocalyptic number.

1988097228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1988097228 is an abundant number, since it is smaller than the sum of its proper divisors (3423946500).

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

1988097228 is a wasteful number, since it uses less digits than its factorization.

1988097228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248094 (or 4248089 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1988097228 is about 44588.0839238467. The cubic root of 1988097228 is about 1257.4166495878.

The spelling of 1988097228 in words is "one billion, nine hundred eighty-eight million, ninety-seven thousand, two hundred twenty-eight".