1153638 has 12 divisors (see below), whose sum is σ = 2499588. Its totient is φ = 384540.

The previous prime is 1153613. The next prime is 1153639. The reversal of 1153638 is 8363511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32028 + ... + 32063.

It is an arithmetic number, because the mean of its divisors is an integer number (208299).

2^1153638 is an apocalyptic number.

1153638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1153638 is an abundant number, since it is smaller than the sum of its proper divisors (1345950).

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

1153638 is a wasteful number, since it uses less digits than its factorization.

1153638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64099 (or 64096 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1153638 is about 1074.0754163465. The cubic root of 1153638 is about 104.8793171273.

The spelling of 1153638 in words is "one million, one hundred fifty-three thousand, six hundred thirty-eight".