1398323520 has 224 divisors, whose sum is σ = 5381792640. Its totient is φ = 338964480.

The previous prime is 1398323513. The next prime is 1398323543. The reversal of 1398323520 is 253238931.

1398323520 is a `hidden beast` number, since 1 + 39 + 83 + 23 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87684 + ... + 102396.

It is an arithmetic number, because the mean of its divisors is an integer number (24025860).

Almost surely, 2^1398323520 is an apocalyptic number.

1398323520 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 1398323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2690896320).

1398323520 is an abundant number, since it is smaller than the sum of its proper divisors (3983469120).

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

1398323520 is a wasteful number, since it uses less digits than its factorization.

1398323520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14750 (or 14734 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1398323520 is about 37394.1642505886. The cubic root of 1398323520 is about 1118.2422257128.

The spelling of 1398323520 in words is "one billion, three hundred ninety-eight million, three hundred twenty-three thousand, five hundred twenty".