1987445080 has 16 divisors (see below), whose sum is σ = 4471751520. Its totient is φ = 794978016.

The previous prime is 1987445059. The next prime is 1987445101. The reversal of 1987445080 is 805447891.

It is an interprime number because it is at equal distance from previous prime (1987445059) and next prime (1987445101).

It is a self number, because there is not a number n which added to its sum of digits gives 1987445080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24843024 + ... + 24843103.

It is an arithmetic number, because the mean of its divisors is an integer number (279484470).

Almost surely, 2^1987445080 is an apocalyptic number.

1987445080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1987445080 is an abundant number, since it is smaller than the sum of its proper divisors (2484306440).

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

1987445080 is a wasteful number, since it uses less digits than its factorization.

1987445080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49686138 (or 49686134 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1987445080 is about 44580.7702939283. The cubic root of 1987445080 is about 1257.2791460122.

The spelling of 1987445080 in words is "one billion, nine hundred eighty-seven million, four hundred forty-five thousand, eighty".