394261990 has 16 divisors (see below), whose sum is σ = 717647040. Its totient is φ = 155932480.

The previous prime is 394261979. The next prime is 394262017. The reversal of 394261990 is 99162493.

It is a congruent number.

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, 220606 + ... + 222385.

It is an arithmetic number, because the mean of its divisors is an integer number (44852940).

Almost surely, 2^394261990 is an apocalyptic number.

394261990 is a deficient number, since it is larger than the sum of its proper divisors (323385050).

394261990 is a wasteful number, since it uses less digits than its factorization.

394261990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443087.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 394261990 is about 19856.0315773319. The cubic root of 394261990 is about 733.2661492630.

The spelling of 394261990 in words is "three hundred ninety-four million, two hundred sixty-one thousand, nine hundred ninety".