380021406 has 16 divisors (see below), whose sum is σ = 761282064. Its totient is φ = 126467264.

The previous prime is 380021377. The next prime is 380021407. The reversal of 380021406 is 604120083.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380021407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47625 + ... + 55028.

It is an arithmetic number, because the mean of its divisors is an integer number (47580129).

Almost surely, 2^380021406 is an apocalyptic number.

380021406 is an abundant number, since it is smaller than the sum of its proper divisors (381260658).

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

380021406 is a wasteful number, since it uses less digits than its factorization.

380021406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103275.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 380021406 is about 19494.1377342010. The cubic root of 380021406 is about 724.3292447034.

Adding to 380021406 its reverse (604120083), we get a palindrome (984141489).

The spelling of 380021406 in words is "three hundred eighty million, twenty-one thousand, four hundred six".