1987898094 has 96 divisors (see below), whose sum is σ = 5612967360. Its totient is φ = 493433856.

The previous prime is 1987898071. The next prime is 1987898117. The reversal of 1987898094 is 4908987891.

It is an interprime number because it is at equal distance from previous prime (1987898071) and next prime (1987898117).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7849 + ... + 63540.

It is an arithmetic number, because the mean of its divisors is an integer number (58468410).

Almost surely, 2^1987898094 is an apocalyptic number.

1987898094 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987898094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2806483680).

1987898094 is an abundant number, since it is smaller than the sum of its proper divisors (3625069266).

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

1987898094 is a wasteful number, since it uses less digits than its factorization.

1987898094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71434 (or 71431 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The square root of 1987898094 is about 44585.8508273645. The cubic root of 1987898094 is about 1257.3746659323.

The spelling of 1987898094 in words is "one billion, nine hundred eighty-seven million, eight hundred ninety-eight thousand, ninety-four".