398425170 has 96 divisors (see below), whose sum is σ = 1132036416. Its totient is φ = 89147520.

The previous prime is 398425169. The next prime is 398425177. The reversal of 398425170 is 71524893.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398425177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42969 + ... + 51411.

It is an arithmetic number, because the mean of its divisors is an integer number (11792046).

Almost surely, 2^398425170 is an apocalyptic number.

398425170 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 398425170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566018208).

398425170 is an abundant number, since it is smaller than the sum of its proper divisors (733611246).

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

398425170 is a wasteful number, since it uses less digits than its factorization.

398425170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488 (or 8477 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 398425170 is about 19960.5904221293. The cubic root of 398425170 is about 735.8380740677.

The spelling of 398425170 in words is "three hundred ninety-eight million, four hundred twenty-five thousand, one hundred seventy".