1988363520 has 864 divisors, whose sum is σ = 8678202624. Its totient is φ = 412876800.

The previous prime is 1988363519. The next prime is 1988363539. The reversal of 1988363520 is 253638891.

It is a happy number.

1988363520 is a `hidden beast` number, since 1 + 9 + 8 + 8 + 3 + 635 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28005085 + ... + 28005155.

It is an arithmetic number, because the mean of its divisors is an integer number (10044216).

Almost surely, 2^1988363520 is an apocalyptic number.

1988363520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988363520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4339101312).

1988363520 is an abundant number, since it is smaller than the sum of its proper divisors (6689839104).

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

1988363520 is a wasteful number, since it uses less digits than its factorization.

1988363520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1988363520 is about 44591.0699580084. The cubic root of 1988363520 is about 1257.4727878627.

The spelling of 1988363520 in words is "one billion, nine hundred eighty-eight million, three hundred sixty-three thousand, five hundred twenty".