1900063728 has 60 divisors (see below), whose sum is σ = 5320557528. Its totient is φ = 632995200.

The previous prime is 1900063723. The next prime is 1900063729. The reversal of 1900063728 is 8273600091.

1900063728 is a `hidden beast` number, since 19 + 0 + 0 + 0 + 637 + 2 + 8 = 666.

It is a super-2 number, since 2×1900063728² = 7220484340922515968, which contains 22 as substring.

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 = 1900063692 and 1900063701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900063721) 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, 406203 + ... + 410853.

Almost surely, 2^1900063728 is an apocalyptic number.

1900063728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1900063728 is an abundant number, since it is smaller than the sum of its proper divisors (3420493800).

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

1900063728 is a wasteful number, since it uses less digits than its factorization.

1900063728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7502 (or 7493 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1900063728 is about 43589.7204395715. The cubic root of 1900063728 is about 1238.5761770368.

It can be divided in two parts, 19000 and 63728, that added together give a palindrome (82728).

The spelling of 1900063728 in words is "one billion, nine hundred million, sixty-three thousand, seven hundred twenty-eight".