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68570420 = 2257943399
BaseRepresentation
bin1000001011001…
…00110100110100
311210000201221012
410011210310310
5120023223140
610445411352
71461560522
oct405446464
9153021835
1068570420
1135784a76
121ab69b58
131128ac19
14916d312
156047265
hex4164d34

68570420 has 24 divisors (see below), whose sum is σ = 145824000. Its totient is φ = 27080352.

The previous prime is 68570417. The next prime is 68570431. The reversal of 68570420 is 2407586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20120 + ... + 23279.

It is an arithmetic number, because the mean of its divisors is an integer number (6076000).

Almost surely, 268570420 is an apocalyptic number.

It is an amenable number.

68570420 is an abundant number, since it is smaller than the sum of its proper divisors (77253580).

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

68570420 is a wasteful number, since it uses less digits than its factorization.

68570420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43487 (or 43485 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 68570420 is about 8280.7258135987. The cubic root of 68570420 is about 409.3036364931.

The spelling of 68570420 in words is "sixty-eight million, five hundred seventy thousand, four hundred twenty".

Divisors: 1 2 4 5 10 20 79 158 316 395 790 1580 43399 86798 173596 216995 433990 867980 3428521 6857042 13714084 17142605 34285210 68570420