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42687210 = 2351422907
BaseRepresentation
bin1010001011010…
…1101011101010
32222022201211210
42202311223222
541411442320
64122533550
71025556336
oct242655352
988281753
1042687210
1122106595
12123672b6
138ac7a07
1459527c6
153b330e0
hex28b5aea

42687210 has 16 divisors (see below), whose sum is σ = 102449376. Its totient is φ = 11383248.

The previous prime is 42687209. The next prime is 42687269. The reversal of 42687210 is 1278624.

It is a super-3 number, since 3×426872103 (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1422907 = 42687210 / (4 + 2 + 6 + 8 + 7 + 2 + 1 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711424 + ... + 711483.

It is an arithmetic number, because the mean of its divisors is an integer number (6403086).

Almost surely, 242687210 is an apocalyptic number.

42687210 is an abundant number, since it is smaller than the sum of its proper divisors (59762166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42687210 is a wasteful number, since it uses less digits than its factorization.

42687210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422917.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 42687210 is about 6533.5449795651. The cubic root of 42687210 is about 349.4882589419.

The spelling of 42687210 in words is "forty-two million, six hundred eighty-seven thousand, two hundred ten".

Divisors: 1 2 3 5 6 10 15 30 1422907 2845814 4268721 7114535 8537442 14229070 21343605 42687210