398949630 has 64 divisors (see below), whose sum is σ = 981531648. Its totient is φ = 103731840.

The previous prime is 398949623. The next prime is 398949637. The reversal of 398949630 is 36949893.

It is an interprime number because it is at equal distance from previous prime (398949623) and next prime (398949637).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398949637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737160 + ... + 737700.

It is an arithmetic number, because the mean of its divisors is an integer number (15336432).

Almost surely, 2^398949630 is an apocalyptic number.

398949630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398949630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490765824).

398949630 is an abundant number, since it is smaller than the sum of its proper divisors (582582018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398949630 is a wasteful number, since it uses less digits than its factorization.

398949630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 398949630 is about 19973.7234886237. The cubic root of 398949630 is about 736.1608016939.

The spelling of 398949630 in words is "three hundred ninety-eight million, nine hundred forty-nine thousand, six hundred thirty".