108987642 has 36 divisors (see below), whose sum is σ = 241359066. Its totient is φ = 35543280.

The previous prime is 108987617. The next prime is 108987643. The reversal of 108987642 is 246789801.

It can be written as a sum of positive squares in only one way, i.e., 100220121 + 8767521 = 10011^2 + 2961^2 .

It is a super-2 number, since 2×108987642² = 23756612217440328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (108987643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38392 + ... + 41132.

Almost surely, 2^108987642 is an apocalyptic number.

108987642 is an abundant number, since it is smaller than the sum of its proper divisors (132371424).

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

108987642 is a wasteful number, since it uses less digits than its factorization.

108987642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2793 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 108987642 is about 10439.7146512728. The cubic root of 108987642 is about 477.6675647030.

The spelling of 108987642 in words is "one hundred eight million, nine hundred eighty-seven thousand, six hundred forty-two".