398054587 has 20 divisors (see below), whose sum is σ = 467318840. Its totient is φ = 339026688.

The previous prime is 398054563. The next prime is 398054603. The reversal of 398054587 is 785450893.

It is a de Polignac number, because none of the positive numbers 2^k-398054587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398054587.

It is not an unprimeable number, because it can be changed into a prime (398054287) 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 19 ways as a sum of consecutive naturals, for example, 462964 + ... + 463822.

It is an arithmetic number, because the mean of its divisors is an integer number (23365942).

Almost surely, 2^398054587 is an apocalyptic number.

398054587 is a deficient number, since it is larger than the sum of its proper divisors (69264253).

398054587 is an frugal number, since it uses more digits than its factorization.

398054587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 398054587 is about 19951.3053958883. The cubic root of 398054587 is about 735.6098641973.

The spelling of 398054587 in words is "three hundred ninety-eight million, fifty-four thousand, five hundred eighty-seven".