398154240473 has 12 divisors (see below), whose sum is σ = 441655677540. Its totient is φ = 358637669280.

The previous prime is 398154240431. The next prime is 398154240521. The reversal of 398154240473 is 374042451893.

It can be written as a sum of positive squares in 2 ways, for example, as 219658130329 + 178496110144 = 468677^2 + 422488^2 .

It is not a de Polignac number, because 398154240473 - 2⁸ = 398154240217 is a prime.

It is a super-2 number, since 2×398154240473² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398154140473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15080990 + ... + 15107367.

It is an arithmetic number, because the mean of its divisors is an integer number (36804639795).

Almost surely, 2^398154240473 is an apocalyptic number.

It is an amenable number.

398154240473 is a deficient number, since it is larger than the sum of its proper divisors (43501437067).

398154240473 is a wasteful number, since it uses less digits than its factorization.

398154240473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30188488 (or 30188477 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 398154240473 in words is "three hundred ninety-eight billion, one hundred fifty-four million, two hundred forty thousand, four hundred seventy-three".