87390424 has 32 divisors (see below), whose sum is σ = 188164800. Its totient is φ = 37631520.

The previous prime is 87390389. The next prime is 87390449. The reversal of 87390424 is 42409378.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24462 + ... + 27805.

It is an arithmetic number, because the mean of its divisors is an integer number (5880150).

Almost surely, 2^87390424 is an apocalyptic number.

It is an amenable number.

87390424 is an abundant number, since it is smaller than the sum of its proper divisors (100774376).

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

87390424 is a wasteful number, since it uses less digits than its factorization.

87390424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52303 (or 52299 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 87390424 is about 9348.2845485148. The cubic root of 87390424 is about 443.7666035181.

The spelling of 87390424 in words is "eighty-seven million, three hundred ninety thousand, four hundred twenty-four".