381902930 has 8 divisors (see below), whose sum is σ = 687425292. Its totient is φ = 152761168.

The previous prime is 381902923. The next prime is 381902933. The reversal of 381902930 is 39209183.

It can be written as a sum of positive squares in 2 ways, for example, as 357172201 + 24730729 = 18899^2 + 4973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (381902933) 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, 19095137 + ... + 19095156.

Almost surely, 2^381902930 is an apocalyptic number.

381902930 is a deficient number, since it is larger than the sum of its proper divisors (305522362).

381902930 is a wasteful number, since it uses less digits than its factorization.

381902930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38190300.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 381902930 is about 19542.3368612866. The cubic root of 381902930 is about 725.5226861010.

The spelling of 381902930 in words is "three hundred eighty-one million, nine hundred two thousand, nine hundred thirty".