1298388 has 96 divisors (see below), whose sum is σ = 3951360. Its totient is φ = 322560.

The previous prime is 1298387. The next prime is 1298467. The reversal of 1298388 is 8838921.

It is a super-2 number, since 2×1298388² = 3371622797088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298387) by changing a digit.

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, 31648 + ... + 31688.

It is an arithmetic number, because the mean of its divisors is an integer number (41160).

2^1298388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975680).

1298388 is an abundant number, since it is smaller than the sum of its proper divisors (2652972).

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

1298388 is a wasteful number, since it uses less digits than its factorization.

1298388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 95 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 1298388 is about 1139.4682970579. The cubic root of 1298388 is about 109.0941587416.

The spelling of 1298388 in words is "one million, two hundred ninety-eight thousand, three hundred eighty-eight".