398870068 has 6 divisors (see below), whose sum is σ = 698022626. Its totient is φ = 199435032.

The previous prime is 398870063. The next prime is 398870081. The reversal of 398870068 is 860078893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 231891984 + 166978084 = 15228^2 + 12922^2 .

It is a super-2 number, since 2×398870068² = 318194662292649248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398870063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49858755 + ... + 49858762.

Almost surely, 2^398870068 is an apocalyptic number.

It is an amenable number.

398870068 is a deficient number, since it is larger than the sum of its proper divisors (299152558).

398870068 is a wasteful number, since it uses less digits than its factorization.

398870068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99717521 (or 99717519 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 398870068 is about 19971.7317226123. The cubic root of 398870068 is about 736.1118612469. Note that the first 3 decimals are identical.

The spelling of 398870068 in words is "three hundred ninety-eight million, eight hundred seventy thousand, sixty-eight".