1987095040 has 320 divisors, whose sum is σ = 5813913600. Its totient is φ = 650280960.

The previous prime is 1987095037. The next prime is 1987095041. The reversal of 1987095040 is 405907891.

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (1987095041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27220444 + ... + 27220516.

It is an arithmetic number, because the mean of its divisors is an integer number (18168480).

Almost surely, 2^1987095040 is an apocalyptic number.

1987095040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987095040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2906956800).

1987095040 is an abundant number, since it is smaller than the sum of its proper divisors (3826818560).

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

1987095040 is an frugal number, since it uses more digits than its factorization.

1987095040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1987095040 is about 44576.8442131114. The cubic root of 1987095040 is about 1257.2053286547.

The spelling of 1987095040 in words is "one billion, nine hundred eighty-seven million, ninety-five thousand, forty".