87921648 has 30 divisors (see below), whose sum is σ = 246058904. Its totient is φ = 29307168.

The previous prime is 87921641. The next prime is 87921653. The reversal of 87921648 is 84612978.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87921641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305140 + ... + 305427.

Almost surely, 2^87921648 is an apocalyptic number.

It is an amenable number.

87921648 is an abundant number, since it is smaller than the sum of its proper divisors (158137256).

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

87921648 is a wasteful number, since it uses less digits than its factorization.

87921648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610581 (or 610572 counting only the distinct ones).

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

The square root of 87921648 is about 9376.6544140221. The cubic root of 87921648 is about 444.6639688488.

It can be divided in two parts, 8792 and 1648, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 87921648 in words is "eighty-seven million, nine hundred twenty-one thousand, six hundred forty-eight".