394722130 has 16 divisors (see below), whose sum is σ = 775090944. Its totient is φ = 143535280.

The previous prime is 394722077. The next prime is 394722137. The reversal of 394722130 is 31227493.

It is a junction number, because it is equal to n+sod(n) for n = 394722092 and 394722101.

It is not an unprimeable number, because it can be changed into a prime (394722137) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1794082 + ... + 1794301.

It is an arithmetic number, because the mean of its divisors is an integer number (48443184).

Almost surely, 2^394722130 is an apocalyptic number.

394722130 is a deficient number, since it is larger than the sum of its proper divisors (380368814).

394722130 is a wasteful number, since it uses less digits than its factorization.

394722130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588401.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 394722130 is about 19867.6151059960. The cubic root of 394722130 is about 733.5513013687.

The spelling of 394722130 in words is "three hundred ninety-four million, seven hundred twenty-two thousand, one hundred thirty".