1987534080 has 432 divisors, whose sum is σ = 8035372800. Its totient is φ = 453390336.

The previous prime is 1987534057. The next prime is 1987534097. The reversal of 1987534080 is 804357891.

1987534080 is a `hidden beast` number, since 198 + 7 + 53 + 408 + 0 = 666.

It is a super-2 number, since 2×1987534080² = 7900583438322892800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3951109 + ... + 3951611.

It is an arithmetic number, because the mean of its divisors is an integer number (18600400).

Almost surely, 2^1987534080 is an apocalyptic number.

1987534080 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 1987534080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4017686400).

1987534080 is an abundant number, since it is smaller than the sum of its proper divisors (6047838720).

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

1987534080 is an equidigital number, since it uses as much as digits as its factorization.

1987534080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1987534080 is about 44581.7684709793. The cubic root of 1987534080 is about 1257.2979131847.

The spelling of 1987534080 in words is "one billion, nine hundred eighty-seven million, five hundred thirty-four thousand, eighty".