128763900400 has 30 divisors (see below), whose sum is σ = 309355271672. Its totient is φ = 51505560000.

The previous prime is 128763900389. The next prime is 128763900407. The reversal of 128763900400 is 4009367821.

It is a super-2 number, since 2×128763900400² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128763900407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160954476 + ... + 160955275.

Almost surely, 2^128763900400 is an apocalyptic number.

128763900400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128763900400 is an abundant number, since it is smaller than the sum of its proper divisors (180591371272).

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

128763900400 is a wasteful number, since it uses less digits than its factorization.

128763900400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321909769 (or 321909758 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 128763900400 in words is "one hundred twenty-eight billion, seven hundred sixty-three million, nine hundred thousand, four hundred".