381042990 has 24 divisors (see below), whose sum is σ = 990712008. Its totient is φ = 101611440.

The previous prime is 381042953. The next prime is 381042997. The reversal of 381042990 is 99240183.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381042997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2116816 + ... + 2116995.

It is an arithmetic number, because the mean of its divisors is an integer number (41279667).

Almost surely, 2^381042990 is an apocalyptic number.

381042990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381042990 is an abundant number, since it is smaller than the sum of its proper divisors (609669018).

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

381042990 is a wasteful number, since it uses less digits than its factorization.

381042990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233824 (or 4233821 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 381042990 is about 19520.3224870902. The cubic root of 381042990 is about 724.9777179042.

The spelling of 381042990 in words is "three hundred eighty-one million, forty-two thousand, nine hundred ninety".