1987850970 has 320 divisors, whose sum is σ = 6638962176. Its totient is φ = 416378880.

The previous prime is 1987850959. The next prime is 1987850983. The reversal of 1987850970 is 790587891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3951739 + ... + 3952241.

Almost surely, 2^1987850970 is an apocalyptic number.

1987850970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987850970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3319481088).

1987850970 is an abundant number, since it is smaller than the sum of its proper divisors (4651111206).

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

1987850970 is a wasteful number, since it uses less digits than its factorization.

1987850970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 1987850970 is about 44585.3223606155. The cubic root of 1987850970 is about 1257.3647303137.

The spelling of 1987850970 in words is "one billion, nine hundred eighty-seven million, eight hundred fifty thousand, nine hundred seventy".