398390950 has 12 divisors (see below), whose sum is σ = 741007260. Its totient is φ = 159356360.

The previous prime is 398390921. The next prime is 398390959. The reversal of 398390950 is 59093893.

It is a self number, because there is not a number n which added to its sum of digits gives 398390950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398390959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3983860 + ... + 3983959.

It is an arithmetic number, because the mean of its divisors is an integer number (61750605).

Almost surely, 2^398390950 is an apocalyptic number.

398390950 is a deficient number, since it is larger than the sum of its proper divisors (342616310).

398390950 is a wasteful number, since it uses less digits than its factorization.

398390950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967831 (or 7967826 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 398390950 is about 19959.7332146499. The cubic root of 398390950 is about 735.8170068747.

The spelling of 398390950 in words is "three hundred ninety-eight million, three hundred ninety thousand, nine hundred fifty".