1323567990 has 48 divisors (see below), whose sum is σ = 3454727328. Its totient is φ = 351571968.

The previous prime is 1323567989. The next prime is 1323567991. The reversal of 1323567990 is 997653231.

1323567990 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1323567989) and next prime (1323567991).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323567991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5482 + ... + 51741.

It is an arithmetic number, because the mean of its divisors is an integer number (71973486).

Almost surely, 2^1323567990 is an apocalyptic number.

1323567990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1323567990 is an abundant number, since it is smaller than the sum of its proper divisors (2131159338).

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

1323567990 is a wasteful number, since it uses less digits than its factorization.

1323567990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57493 (or 57490 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 1323567990 is about 36380.8739587163. The cubic root of 1323567990 is about 1097.9487917432.

It can be divided in two parts, 13235 and 67990, that added together give a square (81225 = 285²).

The spelling of 1323567990 in words is "one billion, three hundred twenty-three million, five hundred sixty-seven thousand, nine hundred ninety".