Base | Representation |
---|---|
bin | 1000000110101… |
… | …00010111111110 |
3 | 11201220200022111 |
4 | 10003110113332 |
5 | 114400310000 |
6 | 10425004234 |
7 | 1453544530 |
oct | 403242776 |
9 | 151820274 |
10 | 67978750 |
11 | 35410494 |
12 | 1a92367a |
13 | 11111818 |
14 | 9057850 |
15 | 5e7bcba |
hex | 40d45fe |
67978750 has 80 divisors (see below), whose sum is σ = 154525536. Its totient is φ = 21888000.
The previous prime is 67978727. The next prime is 67978763. The reversal of 67978750 is 5787976.
It is a super-2 number, since 2×679787502 = 9242220903125000, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 67978694 and 67978703.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 148522 + ... + 148978.
It is a vampire number, since it can be written as 7769 ⋅ 8750 (with its own digits).
Almost surely, 267978750 is an apocalyptic number.
67978750 is an abundant number, since it is smaller than the sum of its proper divisors (86546786).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
67978750 is a wasteful number, since it uses less digits than its factorization.
67978750 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 503 (or 488 counting only the distinct ones).
The product of its (nonzero) digits is 740880, while the sum is 49.
The square root of 67978750 is about 8244.9226800498. The cubic root of 67978750 is about 408.1229885214.
The spelling of 67978750 in words is "sixty-seven million, nine hundred seventy-eight thousand, seven hundred fifty".
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