1987158550 has 48 divisors (see below), whose sum is σ = 4035054240. Its totient is φ = 723651840.

The previous prime is 1987158499. The next prime is 1987158629. The reversal of 1987158550 is 558517891.

1987158550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1987158494 and 1987158503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26511 + ... + 68389.

It is an arithmetic number, because the mean of its divisors is an integer number (84063630).

Almost surely, 2^1987158550 is an apocalyptic number.

1987158550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1987158550 is an abundant number, since it is smaller than the sum of its proper divisors (2047895690).

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

1987158550 is a wasteful number, since it uses less digits than its factorization.

1987158550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41977 (or 41972 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 49.

The square root of 1987158550 is about 44577.5565727867. The cubic root of 1987158550 is about 1257.2187224545.

The spelling of 1987158550 in words is "one billion, nine hundred eighty-seven million, one hundred fifty-eight thousand, five hundred fifty".