1223403140 has 24 divisors (see below), whose sum is σ = 2575634712. Its totient is φ = 488125440.

The previous prime is 1223403133. The next prime is 1223403163. The reversal of 1223403140 is 413043221.

It can be written as a sum of positive squares in 4 ways, for example, as 282508864 + 940894276 = 16808^2 + 30674^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 69101 + ... + 84980.

It is an arithmetic number, because the mean of its divisors is an integer number (107318113).

Almost surely, 2^1223403140 is an apocalyptic number.

1223403140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223403140 is an abundant number, since it is smaller than the sum of its proper divisors (1352231572).

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

1223403140 is a wasteful number, since it uses less digits than its factorization.

1223403140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154487 (or 154485 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1223403140 is about 34977.1802751451. The cubic root of 1223403140 is about 1069.5223477282.

Adding to 1223403140 its reverse (413043221), we get a palindrome (1636446361).

The spelling of 1223403140 in words is "one billion, two hundred twenty-three million, four hundred three thousand, one hundred forty".