1988293855 has 8 divisors (see below), whose sum is σ = 2511529200. Its totient is φ = 1506917376.

The previous prime is 1988293849. The next prime is 1988293861. The reversal of 1988293855 is 5583928891.

It is an interprime number because it is at equal distance from previous prime (1988293849) and next prime (1988293861).

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 1988293855 - 2³ = 1988293847 is a prime.

It is a super-2 number, since 2×1988293855² = 7906624907661522050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1988293855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10464610 + ... + 10464799.

It is an arithmetic number, because the mean of its divisors is an integer number (313941150).

Almost surely, 2^1988293855 is an apocalyptic number.

1988293855 is a deficient number, since it is larger than the sum of its proper divisors (523235345).

1988293855 is a wasteful number, since it uses less digits than its factorization.

1988293855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20929433.

The product of its digits is 6220800, while the sum is 58.

The square root of 1988293855 is about 44590.2887970015. The cubic root of 1988293855 is about 1257.4581019390.

The spelling of 1988293855 in words is "one billion, nine hundred eighty-eight million, two hundred ninety-three thousand, eight hundred fifty-five".