1889725950 has 288 divisors, whose sum is σ = 6376091904. Its totient is φ = 406218240.

The previous prime is 1889725949. The next prime is 1889725951. The reversal of 1889725950 is 595279881.

It is an interprime number because it is at equal distance from previous prime (1889725949) and next prime (1889725951).

It is a super-2 number, since 2×1889725950² = 7142128332206805000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889725951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1445197 + ... + 1446503.

It is an arithmetic number, because the mean of its divisors is an integer number (22139208).

Almost surely, 2^1889725950 is an apocalyptic number.

1889725950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1889725950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3188045952).

1889725950 is an abundant number, since it is smaller than the sum of its proper divisors (4486365954).

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

1889725950 is a wasteful number, since it uses less digits than its factorization.

1889725950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 1889725950 is about 43470.9782498623. The cubic root of 1889725950 is about 1236.3258284172.

The spelling of 1889725950 in words is "one billion, eight hundred eighty-nine million, seven hundred twenty-five thousand, nine hundred fifty".