1200538307838 has 16 divisors (see below), whose sum is σ = 2408897715840. Its totient is φ = 398875919256.

The previous prime is 1200538307831. The next prime is 1200538307873. The reversal of 1200538307838 is 8387038350021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200538307831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325877178 + ... + 325880861.

It is an arithmetic number, because the mean of its divisors is an integer number (150556107240).

Almost surely, 2^{1200538307838} is an apocalyptic number.

1200538307838 is an abundant number, since it is smaller than the sum of its proper divisors (1208359408002).

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

1200538307838 is a wasteful number, since it uses less digits than its factorization.

1200538307838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651758351.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 1200538307838 in words is "one trillion, two hundred billion, five hundred thirty-eight million, three hundred seven thousand, eight hundred thirty-eight".