1397388000 has 384 divisors, whose sum is σ = 4913685504. Its totient is φ = 346368000.

The previous prime is 1397387987. The next prime is 1397388001. The reversal of 1397388000 is 8837931.

It is a self number, because there is not a number n which added to its sum of digits gives 1397388000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397388001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16835959 + ... + 16836041.

It is an arithmetic number, because the mean of its divisors is an integer number (12796056).

Almost surely, 2^1397388000 is an apocalyptic number.

1397388000 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 1397388000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456842752).

1397388000 is an abundant number, since it is smaller than the sum of its proper divisors (3516297504).

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

1397388000 is a wasteful number, since it uses less digits than its factorization.

1397388000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1397388000 is about 37381.6532539694. The cubic root of 1397388000 is about 1117.9927909819.

The spelling of 1397388000 in words is "one billion, three hundred ninety-seven million, three hundred eighty-eight thousand".