394357490 has 16 divisors (see below), whose sum is σ = 712271448. Its totient is φ = 157203456.

The previous prime is 394357463. The next prime is 394357529. The reversal of 394357490 is 94753493.

It can be written as a sum of positive squares in 4 ways, for example, as 348158281 + 46199209 = 18659^2 + 6797^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64367 + ... + 70226.

Almost surely, 2^394357490 is an apocalyptic number.

394357490 is a deficient number, since it is larger than the sum of its proper divisors (317913958).

394357490 is a wasteful number, since it uses less digits than its factorization.

394357490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134893.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 394357490 is about 19858.4362425645. The cubic root of 394357490 is about 733.3253495458.

The spelling of 394357490 in words is "three hundred ninety-four million, three hundred fifty-seven thousand, four hundred ninety".