1986898380 has 48 divisors (see below), whose sum is σ = 5589717504. Its totient is φ = 527325120.

The previous prime is 1986898379. The next prime is 1986898391. The reversal of 1986898380 is 838986891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65812 + ... + 91131.

It is an arithmetic number, because the mean of its divisors is an integer number (116452448).

Almost surely, 2^1986898380 is an apocalyptic number.

1986898380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1986898380 is an abundant number, since it is smaller than the sum of its proper divisors (3602819124).

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

1986898380 is a wasteful number, since it uses less digits than its factorization.

1986898380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157166 (or 157164 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 60.

The square root of 1986898380 is about 44574.6383047580. The cubic root of 1986898380 is about 1257.1638526723.

The spelling of 1986898380 in words is "one billion, nine hundred eighty-six million, eight hundred ninety-eight thousand, three hundred eighty".