1988987050 has 12 divisors (see below), whose sum is σ = 3699516006. Its totient is φ = 795594800.

The previous prime is 1988987047. The next prime is 1988987053. The reversal of 1988987050 is 507898891.

It is an interprime number because it is at equal distance from previous prime (1988987047) and next prime (1988987053).

It can be written as a sum of positive squares in 3 ways, for example, as 1352989089 + 635997961 = 36783^2 + 25219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1988986982 and 1988987000.

It is not an unprimeable number, because it can be changed into a prime (1988987053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19889821 + ... + 19889920.

Almost surely, 2^1988987050 is an apocalyptic number.

1988987050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988987050 is a deficient number, since it is larger than the sum of its proper divisors (1710528956).

1988987050 is a wasteful number, since it uses less digits than its factorization.

1988987050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39779753 (or 39779748 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 55.

The square root of 1988987050 is about 44598.0610565078. The cubic root of 1988987050 is about 1257.6042175627.

The spelling of 1988987050 in words is "one billion, nine hundred eighty-eight million, nine hundred eighty-seven thousand, fifty".