1398457560 has 64 divisors (see below), whose sum is σ = 4210951680. Its totient is φ = 371537280.

The previous prime is 1398457549. The next prime is 1398457583. The reversal of 1398457560 is 657548931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11019 + ... + 54021.

It is an arithmetic number, because the mean of its divisors is an integer number (65796120).

Almost surely, 2^1398457560 is an apocalyptic number.

1398457560 is a gapful number since it is divisible by the number (10) 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 1398457560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105475840).

1398457560 is an abundant number, since it is smaller than the sum of its proper divisors (2812494120).

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

1398457560 is a wasteful number, since it uses less digits than its factorization.

1398457560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43288 (or 43284 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 1398457560 is about 37395.9564659068. The cubic root of 1398457560 is about 1118.2779552601.

The spelling of 1398457560 in words is "one billion, three hundred ninety-eight million, four hundred fifty-seven thousand, five hundred sixty".