398054881 has 12 divisors (see below), whose sum is σ = 490282308. Its totient is φ = 321119232.

The previous prime is 398054879. The next prime is 398054893. The reversal of 398054881 is 188450893.

It can be written as a sum of positive squares in 2 ways, for example, as 357210000 + 40844881 = 18900^2 + 6391^2 .

It is not a de Polignac number, because 398054881 - 2¹ = 398054879 is a prime.

It is a super-2 number, since 2×398054881² = 316895376575848322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398054821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238096 + ... + 239761.

It is an arithmetic number, because the mean of its divisors is an integer number (40856859).

Almost surely, 2^398054881 is an apocalyptic number.

It is an amenable number.

398054881 is a deficient number, since it is larger than the sum of its proper divisors (92227427).

398054881 is a wasteful number, since it uses less digits than its factorization.

398054881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477888 (or 477881 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 398054881 is about 19951.3127638258. The cubic root of 398054881 is about 735.6100453025.

The spelling of 398054881 in words is "three hundred ninety-eight million, fifty-four thousand, eight hundred eighty-one".