1200023040400 has 60 divisors (see below), whose sum is σ = 3008405610432. Its totient is φ = 459139246720.

The previous prime is 1200023040397. The next prime is 1200023040401. The reversal of 1200023040400 is 40403200021.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1200023040401) 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, 65209444 + ... + 65227843.

Almost surely, 2^{1200023040400} is an apocalyptic number.

1200023040400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200023040400 is an abundant number, since it is smaller than the sum of its proper divisors (1808382570032).

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

1200023040400 is a wasteful number, since it uses less digits than its factorization.

1200023040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130437328 (or 130437317 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 1200023040400 its reverse (40403200021), we get a palindrome (1240426240421).

The spelling of 1200023040400 in words is "one trillion, two hundred billion, twenty-three million, forty thousand, four hundred".