1323007638 has 16 divisors (see below), whose sum is σ = 2673294960. Its totient is φ = 436455936.

The previous prime is 1323007619. The next prime is 1323007649. The reversal of 1323007638 is 8367003231.

It is a super-3 number, since 3×1323007638³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1323007599 and 1323007608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136023 + ... + 1137186.

It is an arithmetic number, because the mean of its divisors is an integer number (167080935).

Almost surely, 2^1323007638 is an apocalyptic number.

1323007638 is an abundant number, since it is smaller than the sum of its proper divisors (1350287322).

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

1323007638 is a wasteful number, since it uses less digits than its factorization.

1323007638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273311.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 1323007638 is about 36373.1719540653. The cubic root of 1323007638 is about 1097.7938256088.

The spelling of 1323007638 in words is "one billion, three hundred twenty-three million, seven thousand, six hundred thirty-eight".