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4490031 = 371316447
BaseRepresentation
bin10001001000001100101111
322110010011110
4101020030233
52122140111
6240123103
753110320
oct21101457
98403143
104490031
112597477
121606493
13c12930
1484c447
155da5a6
hex44832f

4490031 has 16 divisors (see below), whose sum is σ = 7368704. Its totient is φ = 2368224.

The previous prime is 4490029. The next prime is 4490053. The reversal of 4490031 is 1300944.

It is not a de Polignac number, because 4490031 - 21 = 4490029 is a prime.

It is a super-2 number, since 2×44900312 = 40320756761922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4490081) 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, 7951 + ... + 8496.

It is an arithmetic number, because the mean of its divisors is an integer number (460544).

Almost surely, 24490031 is an apocalyptic number.

4490031 is a deficient number, since it is larger than the sum of its proper divisors (2878673).

4490031 is a wasteful number, since it uses less digits than its factorization.

4490031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16470.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 4490031 is about 2118.9693249313. The cubic root of 4490031 is about 164.9743578150.

Adding to 4490031 its reverse (1300944), we get a palindrome (5790975).

The spelling of 4490031 in words is "four million, four hundred ninety thousand, thirty-one".

Divisors: 1 3 7 13 21 39 91 273 16447 49341 115129 213811 345387 641433 1496677 4490031