398606670 has 360 divisors, whose sum is σ = 1386959112. Its totient is φ = 81829440.

The previous prime is 398606657. The next prime is 398606683. The reversal of 398606670 is 76606893.

398606670 is a `hidden beast` number, since 39 + 8 + 606 + 6 + 7 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (398606657) and next prime (398606683).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 4802449 + ... + 4802531.

Almost surely, 2^398606670 is an apocalyptic number.

398606670 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 398606670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693479556).

398606670 is an abundant number, since it is smaller than the sum of its proper divisors (988352442).

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

398606670 is a wasteful number, since it uses less digits than its factorization.

398606670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 398606670 is about 19965.1363631707. The cubic root of 398606670 is about 735.9497925246.

The spelling of 398606670 in words is "three hundred ninety-eight million, six hundred six thousand, six hundred seventy".