1987544272 has 60 divisors (see below), whose sum is σ = 4574975040. Its totient is φ = 833665728.

The previous prime is 1987544263. The next prime is 1987544353. The reversal of 1987544272 is 2724457891.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9879 + ... + 63817.

It is an arithmetic number, because the mean of its divisors is an integer number (76249584).

Almost surely, 2^1987544272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987544272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2287487520).

1987544272 is an abundant number, since it is smaller than the sum of its proper divisors (2587430768).

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

1987544272 is a wasteful number, since it uses less digits than its factorization.

1987544272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54008 (or 53995 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 1987544272 is about 44581.8827776486. The cubic root of 1987544272 is about 1257.3000623065.

The spelling of 1987544272 in words is "one billion, nine hundred eighty-seven million, five hundred forty-four thousand, two hundred seventy-two".