380287028 has 18 divisors (see below), whose sum is σ = 731503458. Its totient is φ = 172857520.

The previous prime is 380286979. The next prime is 380287051. The reversal of 380287028 is 820782083.

It can be written as a sum of positive squares in only one way, i.e., 340697764 + 39589264 = 18458^2 + 6292^2 .

It is a junction number, because it is equal to n+sod(n) for n = 380286982 and 380287000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392375 + ... + 393342.

It is an arithmetic number, because the mean of its divisors is an integer number (40639081).

Almost surely, 2^380287028 is an apocalyptic number.

It is an amenable number.

380287028 is a deficient number, since it is larger than the sum of its proper divisors (351216430).

380287028 is a wasteful number, since it uses less digits than its factorization.

380287028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785743 (or 785730 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 380287028 is about 19500.9494127850. The cubic root of 380287028 is about 724.4979658776.

The spelling of 380287028 in words is "three hundred eighty million, two hundred eighty-seven thousand, twenty-eight".