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27390649 = 113131583
BaseRepresentation
bin110100001111…
…1001010111001
31220112120220111
41220133022321
524003000044
62415024321
7451550056
oct150371271
956476814
1027390649
1114509000
12920b0a1
1358a03b0
1438d002d
152610b34
hex1a1f2b9

27390649 has 16 divisors (see below), whose sum is σ = 32465664. Its totient is φ = 22970640.

The previous prime is 27390641. The next prime is 27390667. The reversal of 27390649 is 94609372.

It is not a de Polignac number, because 27390649 - 23 = 27390641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27390641) 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, 16512 + ... + 18094.

It is an arithmetic number, because the mean of its divisors is an integer number (2029104).

Almost surely, 227390649 is an apocalyptic number.

It is an amenable number.

27390649 is a deficient number, since it is larger than the sum of its proper divisors (5075015).

27390649 is a wasteful number, since it uses less digits than its factorization.

27390649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 27390649 is about 5233.6076467385. The cubic root of 27390649 is about 301.4399258029.

The spelling of 27390649 in words is "twenty-seven million, three hundred ninety thousand, six hundred forty-nine".

Divisors: 1 11 13 121 143 1331 1573 1583 17303 17413 20579 191543 226369 2106973 2490059 27390649