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13609444 = 2231710733
BaseRepresentation
bin110011111010…
…100111100100
3221121102122111
4303322213210
511441000234
61203410404
7223451452
oct63724744
927542574
1013609444
117755a82
124683a04
132a86734
141b439d2
1512dc664
hexcfa9e4

13609444 has 12 divisors (see below), whose sum is σ = 23893884. Its totient is φ = 6782624.

The previous prime is 13609433. The next prime is 13609481. The reversal of 13609444 is 44490631.

It can be written as a sum of positive squares in 2 ways, for example, as 921600 + 12687844 = 960^2 + 3562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4099 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (1991157).

Almost surely, 213609444 is an apocalyptic number.

It is an amenable number.

13609444 is a deficient number, since it is larger than the sum of its proper divisors (10284440).

13609444 is a wasteful number, since it uses less digits than its factorization.

13609444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11054 (or 11052 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13609444 is about 3689.0979927348. The cubic root of 13609444 is about 238.7518768527.

The spelling of 13609444 in words is "thirteen million, six hundred nine thousand, four hundred forty-four".

Divisors: 1 2 4 317 634 1268 10733 21466 42932 3402361 6804722 13609444