398906481 has 8 divisors (see below), whose sum is σ = 549032704. Its totient is φ = 257358960.

The previous prime is 398906467. The next prime is 398906483. The reversal of 398906481 is 184609893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398906481 - 2¹⁰ = 398905457 is a prime.

It is a super-2 number, since 2×398906481² = 318252761167606722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 398906481.

It is not an unprimeable number, because it can be changed into a prime (398906483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144566 + ... + 2144751.

It is an arithmetic number, because the mean of its divisors is an integer number (68629088).

Almost surely, 2^398906481 is an apocalyptic number.

398906481 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

398906481 is a deficient number, since it is larger than the sum of its proper divisors (150126223).

398906481 is a wasteful number, since it uses less digits than its factorization.

398906481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289351.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 398906481 is about 19972.6433152950. The cubic root of 398906481 is about 736.1342605424.

The spelling of 398906481 in words is "three hundred ninety-eight million, nine hundred six thousand, four hundred eighty-one".