87420020 has 24 divisors (see below), whose sum is σ = 184615200. Its totient is φ = 34771232.

The previous prime is 87420017. The next prime is 87420049. The reversal of 87420020 is 2002478.

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, 8630 + ... + 15789.

It is an arithmetic number, because the mean of its divisors is an integer number (7692300).

Almost surely, 2^87420020 is an apocalyptic number.

It is an amenable number.

87420020 is an abundant number, since it is smaller than the sum of its proper divisors (97195180).

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

87420020 is a wasteful number, since it uses less digits than its factorization.

87420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24607 (or 24605 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 87420020 is about 9349.8673787386. The cubic root of 87420020 is about 443.8166938043.

Adding to 87420020 its reverse (2002478), we get a palindrome (89422498).

The spelling of 87420020 in words is "eighty-seven million, four hundred twenty thousand, twenty".