1233538740 has 144 divisors (see below), whose sum is σ = 4464331200. Its totient is φ = 281945664.

The previous prime is 1233538703. The next prime is 1233538741. The reversal of 1233538740 is 478353321.

1233538740 is a `hidden beast` number, since 1 + 233 + 5 + 387 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1233538695 and 1233538704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233538741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3151 + ... + 49769.

It is an arithmetic number, because the mean of its divisors is an integer number (31002300).

Almost surely, 2^1233538740 is an apocalyptic number.

1233538740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1233538740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232165600).

1233538740 is an abundant number, since it is smaller than the sum of its proper divisors (3230792460).

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

1233538740 is a wasteful number, since it uses less digits than its factorization.

1233538740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46651 (or 46636 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 1233538740 is about 35121.7701717895. The cubic root of 1233538740 is about 1072.4678067504.

The spelling of 1233538740 in words is "one billion, two hundred thirty-three million, five hundred thirty-eight thousand, seven hundred forty".