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444468889 = 59113163409
BaseRepresentation
bin11010011111100…
…000111010011001
31010222100100200201
4122133200322121
51402241001024
6112034302201
714004631444
oct3237407231
91128310621
10444468889
11208989067
12104a27961
1371111257
144305c65b
1529049744
hex1a7e0e99

444468889 has 16 divisors (see below), whose sum is σ = 459921600. Its totient is φ = 429359616.

The previous prime is 444468887. The next prime is 444468923. The reversal of 444468889 is 988864444.

444468889 = 19272 + 19282 + ... + 20392.

It is a cyclic number.

It is not a de Polignac number, because 444468889 - 21 = 444468887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (444468883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086517 + ... + 1086925.

It is an arithmetic number, because the mean of its divisors is an integer number (28745100).

Almost surely, 2444468889 is an apocalyptic number.

444468889 is the 13334-th heptagonal number.

It is an amenable number.

444468889 is a deficient number, since it is larger than the sum of its proper divisors (15452711).

444468889 is a wasteful number, since it uses less digits than its factorization.

444468889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its digits is 7077888, while the sum is 55.

The square root of 444468889 is about 21082.4308133574. The cubic root of 444468889 is about 763.1568191278.

It can be divided in two parts, 44446 and 8889, that added together give a palindrome (53335).

The spelling of 444468889 in words is "four hundred forty-four million, four hundred sixty-eight thousand, eight hundred eighty-nine".

Divisors: 1 59 113 163 409 6667 9617 18419 24131 46217 66667 1086721 2726803 3933353 7533371 444468889