1323749940 has 24 divisors (see below), whose sum is σ = 3706500000. Its totient is φ = 352999968.

The previous prime is 1323749899. The next prime is 1323749951. The reversal of 1323749940 is 499473231.

1323749940 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1323749892 and 1323749901.

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, 11031190 + ... + 11031309.

It is an arithmetic number, because the mean of its divisors is an integer number (154437500).

Almost surely, 2^1323749940 is an apocalyptic number.

1323749940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323749940 is an abundant number, since it is smaller than the sum of its proper divisors (2382750060).

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

1323749940 is a wasteful number, since it uses less digits than its factorization.

1323749940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22062511 (or 22062509 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 1323749940 is about 36383.3744999004. The cubic root of 1323749940 is about 1097.9991008649. Note that the first 3 decimals are identical.

The spelling of 1323749940 in words is "one billion, three hundred twenty-three million, seven hundred forty-nine thousand, nine hundred forty".