1397169648 has 200 divisors, whose sum is σ = 4645358432. Its totient is φ = 397135872.

The previous prime is 1397169637. The next prime is 1397169649. The reversal of 1397169648 is 8469617931.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1397169594 and 1397169603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397169649) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3057036 + ... + 3057492.

Almost surely, 2^1397169648 is an apocalyptic number.

1397169648 is a gapful number since it is divisible by the number (18) 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 1397169648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2322679216).

1397169648 is an abundant number, since it is smaller than the sum of its proper divisors (3248188784).

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

1397169648 is a wasteful number, since it uses less digits than its factorization.

1397169648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 806 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1397169648 is about 37378.7325627823. The cubic root of 1397169648 is about 1117.9345564572.

The spelling of 1397169648 in words is "one billion, three hundred ninety-seven million, one hundred sixty-nine thousand, six hundred forty-eight".