380729978 has 4 divisors (see below), whose sum is σ = 571094970. Its totient is φ = 190364988.

The previous prime is 380729933. The next prime is 380729983. The reversal of 380729978 is 879927083.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 357852889 + 22877089 = 18917^2 + 4783^2 .

It is a super-2 number, since 2×380729978² = 289910632295760968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95182493 + ... + 95182496.

Almost surely, 2^380729978 is an apocalyptic number.

380729978 is a deficient number, since it is larger than the sum of its proper divisors (190364992).

380729978 is a wasteful number, since it uses less digits than its factorization.

380729978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190364991.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 380729978 is about 19512.3032469260. The cubic root of 380729978 is about 724.7791498537.

The spelling of 380729978 in words is "three hundred eighty million, seven hundred twenty-nine thousand, nine hundred seventy-eight".