380517820 has 12 divisors (see below), whose sum is σ = 799087464. Its totient is φ = 152207120.

The previous prime is 380517811. The next prime is 380517827. The reversal of 380517820 is 28715083.

It is a super-2 number, since 2×380517820² = 289587622675104800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380517827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9512926 + ... + 9512965.

It is an arithmetic number, because the mean of its divisors is an integer number (66590622).

Almost surely, 2^380517820 is an apocalyptic number.

It is an amenable number.

380517820 is an abundant number, since it is smaller than the sum of its proper divisors (418569644).

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

380517820 is a wasteful number, since it uses less digits than its factorization.

380517820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19025900 (or 19025898 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 380517820 is about 19506.8659707294. The cubic root of 380517820 is about 724.6444995115.

The spelling of 380517820 in words is "three hundred eighty million, five hundred seventeen thousand, eight hundred twenty".