987505020 has 60 divisors (see below), whose sum is σ = 3097844904. Its totient is φ = 263334240.

The previous prime is 987505003. The next prime is 987505081. The reversal of 987505020 is 20505789.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 303166 + ... + 306405.

Almost surely, 2^987505020 is an apocalyptic number.

987505020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

987505020 is an abundant number, since it is smaller than the sum of its proper divisors (2110339884).

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

987505020 is a wasteful number, since it uses less digits than its factorization.

987505020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609592 (or 609581 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 987505020 is about 31424.5925987912. The cubic root of 987505020 is about 995.8175380668.

The spelling of 987505020 in words is "nine hundred eighty-seven million, five hundred five thousand, twenty".