628144423830 has 480 divisors, whose sum is σ = 2246581770048. Its totient is φ = 122843381760.

The previous prime is 628144423799. The next prime is 628144423883. The reversal of 628144423830 is 38324441826.

It is a happy number.

628144423830 is a `hidden beast` number, since 6 + 2 + 8 + 144 + 423 + 83 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 11636262 + ... + 11690118.

Almost surely, 2^628144423830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628144423830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123290885024).

628144423830 is an abundant number, since it is smaller than the sum of its proper divisors (1618437346218).

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

628144423830 is a wasteful number, since it uses less digits than its factorization.

628144423830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53922 (or 53902 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 628144423830 in words is "six hundred twenty-eight billion, one hundred forty-four million, four hundred twenty-three thousand, eight hundred thirty".