134987904 has 128 divisors (see below), whose sum is σ = 402696000. Its totient is φ = 44513280.

The previous prime is 134987899. The next prime is 134987911. The reversal of 134987904 is 409789431.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 134987904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480244 + ... + 480524.

Almost surely, 2^134987904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134987904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201348000).

134987904 is an abundant number, since it is smaller than the sum of its proper divisors (267708096).

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

134987904 is a wasteful number, since it uses less digits than its factorization.

134987904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 134987904 is about 11618.4294980001. The cubic root of 134987904 is about 512.9774621609.

It can be divided in two parts, 1349 and 87904, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 134987904 in words is "one hundred thirty-four million, nine hundred eighty-seven thousand, nine hundred four".