381385980 has 36 divisors (see below), whose sum is σ = 1156871352. Its totient is φ = 101702880.

The previous prime is 381385891. The next prime is 381385987. The reversal of 381385980 is 89583183.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381385987) 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, 1059226 + ... + 1059585.

Almost surely, 2^381385980 is an apocalyptic number.

381385980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381385980 is an abundant number, since it is smaller than the sum of its proper divisors (775485372).

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

381385980 is a wasteful number, since it uses less digits than its factorization.

381385980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118826 (or 2118821 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 381385980 is about 19529.1059703203. The cubic root of 381385980 is about 725.1951785250.

The spelling of 381385980 in words is "three hundred eighty-one million, three hundred eighty-five thousand, nine hundred eighty".