100487988 has 72 divisors (see below), whose sum is σ = 264642560. Its totient is φ = 32114880.

The previous prime is 100487983. The next prime is 100487999. The reversal of 100487988 is 889784001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100487983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141378 + ... + 142086.

Almost surely, 2^100487988 is an apocalyptic number.

100487988 is a gapful number since it is divisible by the number (18) 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 100487988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132321280).

100487988 is an abundant number, since it is smaller than the sum of its proper divisors (164154572).

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

100487988 is a wasteful number, since it uses less digits than its factorization.

100487988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 100487988 is about 10024.3697058718. The cubic root of 100487988 is about 464.9126717726.

It can be divided in two parts, 100487 and 988, that added together give a triangular number (101475 = T₄₅₀).

The spelling of 100487988 in words is "one hundred million, four hundred eighty-seven thousand, nine hundred eighty-eight".