398539089 has 16 divisors (see below), whose sum is σ = 635846400. Its totient is φ = 245254608.

The previous prime is 398539061. The next prime is 398539103. The reversal of 398539089 is 980935893.

It is not a de Polignac number, because 398539089 - 2¹³ = 398530897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398539039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567369 + ... + 568070.

It is an arithmetic number, because the mean of its divisors is an integer number (39740400).

Almost surely, 2^398539089 is an apocalyptic number.

398539089 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

398539089 is a deficient number, since it is larger than the sum of its proper divisors (237307311).

398539089 is a wasteful number, since it uses less digits than its factorization.

398539089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135461 (or 1135455 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 398539089 is about 19963.4438161355. The cubic root of 398539089 is about 735.9081984439.

The spelling of 398539089 in words is "three hundred ninety-eight million, five hundred thirty-nine thousand, eighty-nine".