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1640248 = 23205031
BaseRepresentation
bin110010000011100111000
310002022222221
412100130320
5404441443
655053424
716641031
oct6203470
93068887
101640248
11a20385
12671274
1345577c
14309a88
15225eed
hex190738

1640248 has 8 divisors (see below), whose sum is σ = 3075480. Its totient is φ = 820120.

The previous prime is 1640231. The next prime is 1640263. The reversal of 1640248 is 8420461.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102508 + ... + 102523.

It is an arithmetic number, because the mean of its divisors is an integer number (384435).

21640248 is an apocalyptic number.

It is an amenable number.

1640248 is a deficient number, since it is larger than the sum of its proper divisors (1435232).

1640248 is a wasteful number, since it uses less digits than its factorization.

1640248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205037 (or 205033 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1640248 is about 1280.7216715587. The cubic root of 1640248 is about 117.9333148063.

The spelling of 1640248 in words is "one million, six hundred forty thousand, two hundred forty-eight".

Divisors: 1 2 4 8 205031 410062 820124 1640248