1398061056 has 96 divisors (see below), whose sum is σ = 4259848320. Its totient is φ = 399433728.

The previous prime is 1398061051. The next prime is 1398061073. The reversal of 1398061056 is 6501608931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398061051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26755 + ... + 59261.

It is an arithmetic number, because the mean of its divisors is an integer number (44373420).

Almost surely, 2^1398061056 is an apocalyptic number.

1398061056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398061056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2129924160).

1398061056 is an abundant number, since it is smaller than the sum of its proper divisors (2861787264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398061056 is an equidigital number, since it uses as much as digits as its factorization.

1398061056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32539 (or 32519 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1398061056 is about 37390.6546612920. The cubic root of 1398061056 is about 1118.1722569995.

Adding to 1398061056 its reverse (6501608931), we get a palindrome (7899669987).

The spelling of 1398061056 in words is "one billion, three hundred ninety-eight million, sixty-one thousand, fifty-six".