1988356087 has 8 divisors (see below), whose sum is σ = 2057486400. Its totient is φ = 1919263584.

The previous prime is 1988356081. The next prime is 1988356147. The reversal of 1988356087 is 7806538891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1988356087 - 2²⁷ = 1854138359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988356081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135378 + ... + 149344.

It is an arithmetic number, because the mean of its divisors is an integer number (257185800).

Almost surely, 2^1988356087 is an apocalyptic number.

1988356087 is a deficient number, since it is larger than the sum of its proper divisors (69130313).

1988356087 is a wasteful number, since it uses less digits than its factorization.

1988356087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18905.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 1988356087 is about 44590.9866116461. The cubic root of 1988356087 is about 1257.4712209448.

The spelling of 1988356087 in words is "one billion, nine hundred eighty-eight million, three hundred fifty-six thousand, eighty-seven".