1398237481 has 8 divisors (see below), whose sum is σ = 1415548800. Its totient is φ = 1381029408.

The previous prime is 1398237461. The next prime is 1398237487. The reversal of 1398237481 is 1847328931.

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

It is a cyclic number.

It is not a de Polignac number, because 1398237481 - 2⁹ = 1398236969 is a prime.

It is a super-2 number, since 2×1398237481² = 3910136106546450722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398237487) 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, 1620 + ... + 52906.

It is an arithmetic number, because the mean of its divisors is an integer number (176943600).

Almost surely, 2^1398237481 is an apocalyptic number.

It is an amenable number.

1398237481 is a deficient number, since it is larger than the sum of its proper divisors (17311319).

1398237481 is a wasteful number, since it uses less digits than its factorization.

1398237481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51623.

The product of its digits is 290304, while the sum is 46.

The square root of 1398237481 is about 37393.0137993717. The cubic root of 1398237481 is about 1118.2192900533.

The spelling of 1398237481 in words is "one billion, three hundred ninety-eight million, two hundred thirty-seven thousand, four hundred eighty-one".