87491424 has 48 divisors (see below), whose sum is σ = 237081600. Its totient is φ = 28222080.

The previous prime is 87491423. The next prime is 87491429. The reversal of 87491424 is 42419478.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87491423) 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 7 ways as a sum of consecutive naturals, for example, 11724 + ... + 17675.

It is an arithmetic number, because the mean of its divisors is an integer number (4939200).

Almost surely, 2^87491424 is an apocalyptic number.

It is an amenable number.

87491424 is an abundant number, since it is smaller than the sum of its proper divisors (149590176).

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

87491424 is a wasteful number, since it uses less digits than its factorization.

87491424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29443 (or 29435 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 87491424 is about 9353.6850492199. The cubic root of 87491424 is about 443.9374962741.

The spelling of 87491424 in words is "eighty-seven million, four hundred ninety-one thousand, four hundred twenty-four".