380887281990 has 32 divisors (see below), whose sum is σ = 1015699419360. Its totient is φ = 101569941792.

The previous prime is 380887281979. The next prime is 380887281991. The reversal of 380887281990 is 99182788083.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380887281991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705346549 + ... + 705347088.

It is an arithmetic number, because the mean of its divisors is an integer number (31740606855).

Almost surely, 2^380887281990 is an apocalyptic number.

380887281990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

380887281990 is an abundant number, since it is smaller than the sum of its proper divisors (634812137370).

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

380887281990 is a wasteful number, since it uses less digits than its factorization.

380887281990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410693653 (or 1410693647 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 380887281990 in words is "three hundred eighty billion, eight hundred eighty-seven million, two hundred eighty-one thousand, nine hundred ninety".