1587002220 has 120 divisors (see below), whose sum is σ = 5139243648. Its totient is φ = 409536000.

The previous prime is 1587002201. The next prime is 1587002233. The reversal of 1587002220 is 222007851.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34420 + ... + 66020.

Almost surely, 2^1587002220 is an apocalyptic number.

1587002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1587002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569621824).

1587002220 is an abundant number, since it is smaller than the sum of its proper divisors (3552241428).

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

1587002220 is a wasteful number, since it uses less digits than its factorization.

1587002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31653 (or 31642 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1587002220 is about 39837.1964375005. The cubic root of 1587002220 is about 1166.4313352096.

The spelling of 1587002220 in words is "one billion, five hundred eighty-seven million, two thousand, two hundred twenty".