1398057570 has 240 divisors, whose sum is σ = 4655344320. Its totient is φ = 294772608.

The previous prime is 1398057547. The next prime is 1398057587. The reversal of 1398057570 is 757508931.

1398057570 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 0 + 575 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 957501 + ... + 958959.

It is an arithmetic number, because the mean of its divisors is an integer number (19397268).

Almost surely, 2^1398057570 is an apocalyptic number.

1398057570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398057570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2327672160).

1398057570 is an abundant number, since it is smaller than the sum of its proper divisors (3257286750).

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

1398057570 is a wasteful number, since it uses less digits than its factorization.

1398057570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The square root of 1398057570 is about 37390.6080453367. The cubic root of 1398057570 is about 1118.1713276286.

The spelling of 1398057570 in words is "one billion, three hundred ninety-eight million, fifty-seven thousand, five hundred seventy".