1398894841 has 4 divisors (see below), whose sum is σ = 1399840884. Its totient is φ = 1397948800.

The previous prime is 1398894829. The next prime is 1398894857. The reversal of 1398894841 is 1484988931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1484988931 = 2113 ⋅702787.

It can be written as a sum of positive squares in 2 ways, for example, as 940035600 + 458859241 = 30660^2 + 21421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398894841 - 2¹¹ = 1398892793 is a prime.

It is a super-3 number, since 3×1398894841³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398894241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470800 + ... + 473761.

It is an arithmetic number, because the mean of its divisors is an integer number (349960221).

Almost surely, 2^1398894841 is an apocalyptic number.

It is an amenable number.

1398894841 is a deficient number, since it is larger than the sum of its proper divisors (946043).

1398894841 is an equidigital number, since it uses as much as digits as its factorization.

1398894841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946042.

The product of its digits is 1990656, while the sum is 55.

The square root of 1398894841 is about 37401.8026437229. The cubic root of 1398894841 is about 1118.3945005065.

The spelling of 1398894841 in words is "one billion, three hundred ninety-eight million, eight hundred ninety-four thousand, eight hundred forty-one".