1889366401 has 4 divisors (see below), whose sum is σ = 2034702292. Its totient is φ = 1744030512.

The previous prime is 1889366351. The next prime is 1889366411. The reversal of 1889366401 is 1046639881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148474225 + 1740892176 = 12185^2 + 41724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889366401 - 2¹⁹ = 1888842113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889366411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72667926 + ... + 72667951.

It is an arithmetic number, because the mean of its divisors is an integer number (508675573).

Almost surely, 2^1889366401 is an apocalyptic number.

It is an amenable number.

1889366401 is a deficient number, since it is larger than the sum of its proper divisors (145335891).

1889366401 is a wasteful number, since it uses less digits than its factorization.

1889366401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145335890.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1889366401 is about 43466.8425469346. The cubic root of 1889366401 is about 1236.2474135354.

The spelling of 1889366401 in words is "one billion, eight hundred eighty-nine million, three hundred sixty-six thousand, four hundred one".