101987988 has 12 divisors (see below), whose sum is σ = 237972000. Its totient is φ = 33995992.

The previous prime is 101987987. The next prime is 101987999. The reversal of 101987988 is 889789101.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 101987988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101987987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4249488 + ... + 4249511.

It is an arithmetic number, because the mean of its divisors is an integer number (19831000).

Almost surely, 2^101987988 is an apocalyptic number.

It is an amenable number.

101987988 is an abundant number, since it is smaller than the sum of its proper divisors (135984012).

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

101987988 is a wasteful number, since it uses less digits than its factorization.

101987988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8499006 (or 8499004 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 51.

The square root of 101987988 is about 10098.9102382386. The cubic root of 101987988 is about 467.2145309349.

The spelling of 101987988 in words is "one hundred one million, nine hundred eighty-seven thousand, nine hundred eighty-eight".