1231733340 has 36 divisors (see below), whose sum is σ = 3736258344. Its totient is φ = 328462176.

The previous prime is 1231733333. The next prime is 1231733341. The reversal of 1231733340 is 433371321.

1231733340 is a `hidden beast` number, since 1 + 2 + 317 + 3 + 3 + 340 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231733341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3421302 + ... + 3421661.

It is an arithmetic number, because the mean of its divisors is an integer number (103784954).

Almost surely, 2^1231733340 is an apocalyptic number.

1231733340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231733340 is an abundant number, since it is smaller than the sum of its proper divisors (2504525004).

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

1231733340 is a wasteful number, since it uses less digits than its factorization.

1231733340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842978 (or 6842973 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 1231733340 is about 35096.0587530851. The cubic root of 1231733340 is about 1071.9443321041.

The spelling of 1231733340 in words is "one billion, two hundred thirty-one million, seven hundred thirty-three thousand, three hundred forty".