1232211440 has 40 divisors (see below), whose sum is σ = 2931525168. Its totient is φ = 481420800.

The previous prime is 1232211439. The next prime is 1232211523. The reversal of 1232211440 is 441122321.

It is a tau number, because it is divible by the number of its divisors (40).

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

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, 175661 + ... + 182540.

Almost surely, 2^1232211440 is an apocalyptic number.

1232211440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232211440 is an abundant number, since it is smaller than the sum of its proper divisors (1699313728).

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

1232211440 is a wasteful number, since it uses less digits than its factorization.

1232211440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358257 (or 358251 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1232211440 is about 35102.8693983839. The cubic root of 1232211440 is about 1072.0830066786.

Adding to 1232211440 its reverse (441122321), we get a palindrome (1673333761).

The spelling of 1232211440 in words is "one billion, two hundred thirty-two million, two hundred eleven thousand, four hundred forty".