1987157080 has 16 divisors (see below), whose sum is σ = 4471103520. Its totient is φ = 794862816.

The previous prime is 1987156999. The next prime is 1987157083. The reversal of 1987157080 is 807517891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987157080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987157083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24839424 + ... + 24839503.

It is an arithmetic number, because the mean of its divisors is an integer number (279443970).

Almost surely, 2^1987157080 is an apocalyptic number.

1987157080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1987157080 is an abundant number, since it is smaller than the sum of its proper divisors (2483946440).

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

1987157080 is a wasteful number, since it uses less digits than its factorization.

1987157080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49678938 (or 49678934 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 1987157080 is about 44577.5400846660. The cubic root of 1987157080 is about 1257.2184124454.

The spelling of 1987157080 in words is "one billion, nine hundred eighty-seven million, one hundred fifty-seven thousand, eighty".