1397218800 has 120 divisors (see below), whose sum is σ = 4499017600. Its totient is φ = 370656000.

The previous prime is 1397218783. The next prime is 1397218841. The reversal of 1397218800 is 88127931.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235875 + ... + 241725.

Almost surely, 2^1397218800 is an apocalyptic number.

1397218800 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 1397218800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249508800).

1397218800 is an abundant number, since it is smaller than the sum of its proper divisors (3101798800).

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

1397218800 is a wasteful number, since it uses less digits than its factorization.

1397218800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071 (or 6060 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1397218800 is about 37379.3900431775. The cubic root of 1397218800 is about 1117.9476658351.

The spelling of 1397218800 in words is "one billion, three hundred ninety-seven million, two hundred eighteen thousand, eight hundred".