87420534 has 8 divisors (see below), whose sum is σ = 174841080. Its totient is φ = 29140176.

The previous prime is 87420499. The next prime is 87420563. The reversal of 87420534 is 43502478.

It is a sphenic number, since it is the product of 3 distinct primes.

87420534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 87420495 and 87420504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7285039 + ... + 7285050.

It is an arithmetic number, because the mean of its divisors is an integer number (21855135).

Almost surely, 2^87420534 is an apocalyptic number.

87420534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87420534 is a wasteful number, since it uses less digits than its factorization.

87420534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14570094.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 87420534 is about 9349.8948657191. The cubic root of 87420534 is about 443.8175636330.

The spelling of 87420534 in words is "eighty-seven million, four hundred twenty thousand, five hundred thirty-four".