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137428730 = 2537616089
BaseRepresentation
bin10000011000011…
…11111011111010
3100120121002202222
420030033323322
5240140204410
621345324042
73256060565
oct1014177372
9316532688
10137428730
117063626a
123a036622
1322619b9a
14143754dc
15c0e9955
hex830fefa

137428730 has 32 divisors (see below), whose sum is σ = 258264720. Its totient is φ = 52600320.

The previous prime is 137428721. The next prime is 137428741. The reversal of 137428730 is 37824731.

It is a Cunningham number, because it is equal to 117232+1.

It can be written as a sum of positive squares in 8 ways, for example, as 30946969 + 106481761 = 5563^2 + 10319^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19526 + ... + 25614.

Almost surely, 2137428730 is an apocalyptic number.

137428730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137428730 is a deficient number, since it is larger than the sum of its proper divisors (120835990).

137428730 is a wasteful number, since it uses less digits than its factorization.

137428730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 137428730 is about 11723.0000426512. Note that the first 4 decimals coincide. The cubic root of 137428730 is about 516.0508658267.

The spelling of 137428730 in words is "one hundred thirty-seven million, four hundred twenty-eight thousand, seven hundred thirty".

Divisors: 1 2 5 10 37 61 74 122 185 305 370 610 2257 4514 6089 11285 12178 22570 30445 60890 225293 371429 450586 742858 1126465 1857145 2252930 3714290 13742873 27485746 68714365 137428730