398747481 has 16 divisors (see below), whose sum is σ = 605214720. Its totient is φ = 231157520.

The previous prime is 398747473. The next prime is 398747497. The reversal of 398747481 is 184747893.

It is not a de Polignac number, because 398747481 - 2³ = 398747473 is a prime.

It is a super-2 number, since 2×398747481² = 317999107207690722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398747441) 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, 261921 + ... + 263438.

It is an arithmetic number, because the mean of its divisors is an integer number (37825920).

Almost surely, 2^398747481 is an apocalyptic number.

It is an amenable number.

398747481 is a deficient number, since it is larger than the sum of its proper divisors (206467239).

398747481 is a wasteful number, since it uses less digits than its factorization.

398747481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525396.

The product of its digits is 1354752, while the sum is 51.

The square root of 398747481 is about 19968.6624739866. The cubic root of 398747481 is about 736.0364423758.

The spelling of 398747481 in words is "three hundred ninety-eight million, seven hundred forty-seven thousand, four hundred eighty-one".